Meso-ionic heterocycles (1976-1980)

Tetrahedron

Volumn 38, Issue 20, 1982, Pages 2965-3011

  Newton, Christopher G ^a   Ramsden, Christopher A ^a  

^a May and Baker Limited   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 42049087420     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/0040-4020(82)80186-5     Document Type: Article

References (410)

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2. 158. The constitution and isomerism of certain triazole derivatives of the nitron type in the light of the Bredt rule and the theory of resonance
3. A New Furan Synthesis. Evidence for the Intermediacy of the Elusive Anhydro-5-hydroxy-1,3-dioxolium Hydroxide System
4. NEW TYPE OF MESOIONIC SYSTEM. 1,3-DIPOLAR CYCLOADDITION OF ANHYDRO-4-HYDROXY-1,3-OXAZOLIUM HYDROXIDE WITH ACETYLENIC COMPOUNDS
5. NEW TYPE OF MESOIONIC SYSTEM. 1,3-DIPOLAR CYCLOADDITION OF ISOMUNCHNON WITH ETHYLENIC COMPOUNDS
6. 1,3-Dipolar cycloaddition of anhydro-4-hydroxy-1,3-oxazolium hydroxides with carbonyl compounds
7. 1,3-Polar addition of 1,3-oxazolium-4-olates with protic reagents
8. New stable mesoionic oxazolones by the double cyclization of phenylglycine--carboxylic acid
9. Notiz zur Isolierung der 2-Oxazolinon- und Oxazolium-5-olat-Formen bei 2,4-Diaryloxazolin-5-onen
10. Synthesis of the 8?-pyrrolizidine bases (+)-isoretronecanol, (+)-laburnine, and (+)-supinidine
11. Synthesis of optically active pyrrolizidine bases
12. Heterocycles by cycloaddition. Part II. Cycloaddition?extrusion reactions of five-membered mesoionic compounds with benzyne: prepartion of benz[c]azole and benzo[c]thiophen derivatives
13. Heterocycles by Cycloaddition. IV. Cycloaddition Reactions of Mesoionic Compounds with a 7-Azabicyclo[2.2.1]heptadiene, and Double Fragmentation of the Adducts
14. Heterocycles by Cycloaddition. III. Dihydroisoindolequinone, the Correct Structure of the Proposed Azatetracyclononanedione
15. Zur reaktion von 1,3-diphenyl-2-methyl-1,3-oxazolium-5-olat mit α,β-ungesättigten 1,4-di-carbonylverbindungen
16. Heterocycles by cycloaddition. Part I. Cycloaddition?extrusion?ring expansion reactions of five-membered mesoionic compounds with diphenylcyclopropenone and related compounds: preparation of six-membered heterocycles
17. Reaktionen mesoionischer fünfringheterocyclen mit o-chinoiden verbindungen
18. Cycloaddition reactions ofmeso-ionic oxazolone with cinnamaldehyde anils
19. Die Struktur des Adduktes aus 3-Dimethylamino-2,2-dimethyl-2H-azirin und 3-Methyl-2,4-diphenyl-1,3-oxazolium-5-olat. Vorl�ufige Mitteilung
20. Reaktionen der valenzpolaromeren Ketenform mesoionischer Heterocyclen mit 3-Dimethylamino-2H-azirinen
21. Photooxidation of some mesoionic and related systems.
22. Synthetic uses of open-chain analogs of Reissert compounds
23. Condensation of Reissert hydrofluoroborate salts with alkenes and alkynes
24. Reissert compound studies. XXXV. Acid-catalyzed condensations of the phthalazine reissert compound and condensations of phthalazine reissert compound salt
25. [3+2]-Cycloadditions of Mesoionic 1,3-Oxathio-4-ones to Alkynes. A New Entry to the Furan Series
26. Eine neue Furan-Synthese durch thermische in situ-Cycloadditionen neuer mesoionischer 1,3-Oxathiolone an Alkin
27. INTERMEDIATORY FORMATION OF MESOIONIC IMIDAZOLIUM-4-OXIDES IN THE REACTION OF α-HALOACYL CHLORIDES WITH AMIDINES
28. Reactions of 4-halogeno- and 4-methylthio-imidazolium salts with sulphide and methanethiolate ions
29. Cyclization of N-formyl- and N-thioformyl-sarcosine-N-methylthioamide into methylaminothiazolium and anhydro-mercaptoimidazolium hydroxide derivatives
30. Synthese neuer Thieno [2?,3?; 4,5]imidazo[1,2-a]pyridiniumsalze
31. Photochemical transformations. Part 36. Synthesis and photolytic ring contraction of mesoionic 2-alkylthiothiazol-4-ones; a new route to ?-lactams
32. A new synthetic route to mesoionic thiazoles
33. Heterocycles by cycloaddition. Part 5. Preparation of 7,9-diheteratricyclo[4.2.1.02,5]non-3-en-8-one derivatives from mesoionic compounds
34. Synthesis of anhydro-2,3,5-triphenyl-4-hydroxyselenazolium hydroxide, a mesoionic selenium heterocycle
35. Darstellung und physikalische Eigenschaften mesoionischer 1,3-Dithiolone1)
36. Meso-ionic Compounds of the 1,3-Dithiole Ring System
37. Synthese und Cycloadditionen neuer Dimerer aus mesoionischen 1,3-Dithiolonen
38. Ein neuer präparativer Zugang zu Thiophen-Derivaten durch thermische [3 + 2]-Cycloadditionen mesoionischer 1,3-Dithiolone and Alkine1)
39. Darstellung mesoionischer 2-Amino-1,3-dithiolone und ihre [3 + 2]-Cycloadditionen an symmetrische Alkine
40. Zur Regioselektivität der [3 + 2]-Cycloadditionen mesoionischer 1,3-Dithiolone an unsymmetrische Alkine
41. [3 + 2]-Cycloadditionen mesoionischer 1,3-Dithiolone an Ethylendicarbonsäure-Derivate und 1,2-Dibenzoylethylen
42. Cycloadditionen mesoionischer 1,3-Dithiolone an cyclische Olefin-Abkömmlinge
43. Neue [3 + 2]-Cycloadditionen mesoionischer 1,3-Dithiolone an Heterodoppelbindungen
44. Darstellung von 1,3-Dithiolylium-Salzen und Reaktionen mesoionischer 1,3-Dithiolone mit Aminen
45. Khim. Prom-st., Ser.: Reakt. Osobo Chist. Veshchestva
46. ANODIC CHLORINATION AND BROMINATION OF 3-SUBSTITUTED SYDNONE COMPOUNDS
47. 320. Cyclic meso-ionic compounds. Part III. Further properties of the sydnones and the mechanism of their formation
48. Approaches to the synthesis of compounds containing fused mesoionic rings
49. Sydnon-�thylene. I Stereoselektive Darstellung von Sydnon-�thylenen aus Sydnon-aldehyden
50. Mesoionic compounds. Part 10. A study of the reactions of 3-(3-pyridyl)sydnone with some nucleophilic reagents
51. Marpha Societe d'Etude et d'Exploitation de Marques
52. Thermische Cycloadditionen bekannter und neuer Sydnone an Acetylenester
53. Lichtinduzierte Reaktionen der Sydnone in Gegenwart von Mehrfachbindungssystemen
54. Thermische und photochemisch induzierte intramolekulare, 1,3-dipolare Cycloadditionen von 4-Phenyl-3-(2-allylphenyl)-sydnon. Vorl�ufige Mitteilung. 53. Mitteilung �ber Photoreaktionen
55. Kristallstruktur eines �berbr�ckten 1,2,3-Oxadiazolidin-5-ons
56. 1,3-Dipolar Addition Reactions with Vinylpyrroles
57. Double 1,3-Dipolar Cycloaddition Reaction of 3-Phenylsydnone with 1,3-Dienes
58. Synthesis of Carbonyl Cyanide Alkylhydrazones
59. Photochemical and thermal reactions of heterocycles. Part I. Photolysis, thermolysis, and mass spectral fragmentation of mesoionic 1,2,4-triazol-3-ones
60. Zum photochemischen Verhalten von Sydnonen und 1,3,4-Oxadiazolin-2-onen. 56. Mitteilung �ber Photoreaktionen
61. Beiträge zum Mechanismus der photochemischen Reaktionen von Phenylsydnonen
62. Photoreaktionen des 3-Methyl-4-phenylsydnons
63. Sydnon-�thylene. III. Chemische Reaktionen elektronisch angeregter 4-Styryl-sydnone
64. Sydnon-ethylene; Zum Verhalten von 1-Sydnonyl-2-azulenyl-ethylenen bei UV-Anregung
65. Synthese und Photochemie von Sydnonazomethinen-(4)
66. Einkristallröntgenstrukturanalyse eines Zwitterionischen, Photoisomeren Umlagerungsproduktes eines Sydnons mit Spiranstruktur
67. Evidence for one-bond cleavage in the thermolysis of (−)-(S)-1-diphenylmethyl-2-(2-butyl)diazene and of 1-diphenylmethyl-2-phenyldiazene
68. Stereochemical studies. IV. The role of carbocations in the oxidation of alkylhydrazines
69. Sydnone, III. 4-Sydnonylsilane
70. Study of photochromic sydnones. I. Structure of 3-phenyl-4-(3-methyl-1-buten-2-yl)sydnone
71. Study of photochromic sydnones. II. Structure of 4-bromo-3-(3-pyridyl)sydnone
72. Structure of 4-(1-cyclohexenyl)-3-phenylsydnone
73. Nitrogen NMR sudies of some15N labelled sydnones and related stuctures
74. Sydnon-�thylene. II. Elektronische Wechselwirkungen in 4-Styryl-sydnonen
75. Sydnones. Synthesis and Photochromic Behavior of 3-(3-Pyridyl)sydnone Derivatives and a 4-Alkenyl-3-phenylsydnone
76. Photochromism of 4-isopropenyl-3-phenylsydnone and its dimer
77. Mesoionic compounds. Sydnones and their photochromic properties
78. Sydnones and their photochromic properties
79. Photochemistry of some three-membered heterocycles
80. Crystal and molecular structures of sydnones, 4,5-diphenylisosydnone, and mesoionic tetrazoles
81. MO-Berechnungen an substituierten Sydnonen. III. Quantenchemische Charakterisierung UV-spektroskopisch beobachteter angeregter Zust�nde von Sydnonazomethinen
82. Susceptibility of "Enterobacteria" to Penicillins, Cephalosporins, Lincomycins, Erythromycin, and Rifampin
83. The Chemistry of Sydnone Imines
84. Khim. Get. Soedin
85. [Synocarb metabolism in rats].
86. Takeda Kenkyusho Ho.
87. [Pharmacological properties of sidnocarb analogs].
88. Studies on mesoionic compounds. Part 6. Synthesis of three new mesoionic heterocyclic systems; sulphur-containing analogues of sydnone
89. Mesoionic compounds. Part 5. The acid-catalysed hydrolysis of diarylisosydnones
90. The reaction of 2-aminopyridine 1-oxides with thiophosgene. 2H-[1,2,4]Oxadiazolo[2,3-a]pyridin-2-thiones
91. Strong evidence for thiazirines as stable intermediates at cryogenic temperatures in the photolytic formation of nitrile sulphides from arylsubstituted 1,2,3,4-thiatriazole, thiatriazole 3-oxide, and 1,3,4-oxathiazol-2-one
92. A flash photolytic study of thiatriazoles and mesoionic oxathiazoles. The thermal decomposition of nitrite sulphides
93. The Crystal Structure of 1,3-Dimethyl-4-(1,2,3-triazolio)sulfide.
94. Synthesis of Mesoionic Triazolopyridine. I. N-Alkylation of 1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one
95. Purine analogues as amplifiers of phleomycin. II. Some s-Triazolo[4,3-a]pyridines, s-Triazolo[4,3- or 1,5-a]pyrimidines and s-Triazolo[3,4-b]benzothiazoles
96. A new mesoionic species in the synthesis of some 5-thioxo-1,2,4-triazolin-3-ones
97. Crystal structures of nitron and its non-stoichiometric hydrochloride
98. Meso-ionic 1,3,4-thiadiazolium and 1,3,4-triazolium-2-benzylidenehydrazinides
99. Cyclic meso-ionic compounds. Part 15. Synthesis, spectroscopic properties, and chemistry of 1,3,4-thiadiazolium-2-benzylidenehydrazinides and 1,2,4-triazolium-3-benzylidenehydrazinides
100. Meso-ionic 1-amino-1,3,4-triazolium-2-thiolates
101. Studies on mesoionic compounds. Part 7. Some aspects of the reaction of the 1,2,3-thiadiazolium-4-olate system
102. Methylation of 4-phenyl-1,2,3-thiadiazole. Reaction of nucleophiles withN-methyl-1,2,3-thiadiazolium salts and the crystal structure of the products
103. The Mesoionic System 3-Methyl-4-phenyl-1,2,3-thiadiazolium-5-thiolate, Synthesis and X-Ray Structure Determination
104. Über die Alkylierung einiger Aminotheterocyclen und die Umlagerung heterocyclischer Imine in Amine
105. Über 1.2.4-Thiadiazole, XX. Zur Kenntnis der 3-Amino-thiadiazole
106. On the reaction of dialkyl acylphosphonate with 2-methyl-1,3,4-thiadiazolium salts.
107. The effect of solvents on the electronic absorption spectra of mesoionic 1,8,4 thiadiazolium-2-thiolate derivatives
108. Synthesis and X-ray molecular structure of a mesoionic 2-methylene-1,3,4-thiadiazole
109. The Structure of O-[3-Phenyl-5-(1,2,3,4-oxatriazolio)] Oxide at -165 degrees C.
110. Cyclic meso-ionic compounds. Part 20. Mass spectra of meso-ionic heterocycles
111. Cyclic mesoionic compounds. Part 14. The electric dipole moments of mesoionic heterocycles
112. Mesoionic compounds. Part 6. Acid-catalysed hydrolysis of alkyloxatriazoles
113. Cyclic meso-ionic compounds. Part 17. Synthesis, spectroscopic properties, and chemistry of 1,2,3,4-oxatriazolium-5-aminides and 1,2,3,4-tetrazolium-5-olates
114. Synthesis of three new meso-ionic heterocyclic systems
115. Cyclic meso-ionic compounds. Part 16. Synthesis, spectroscopic properties, and chemistry of 1,2,3,4-oxatriazolium-5-thiolates, 1,2,3,4-thiatriazolium-5-olates, and 1,2,3,4-thiatriazolium-5-thiolates
116. Thermal isomerisation of mesoinic tetrazoles. A new type of heterocyclic rearrangement
117. Cyclic meso-ionic compounds. Part 18. The synthesis and spectroscopic properties of 1,2,3,4-thiatriazolium-5-aminides and 1,2,3,4-tetrazolium-5-thiolates
118. Ueber das Diformazyl und seine Beziehung zum Diamidrazon
119. Ueber die Einwirkung von Diazobenzol auf einige aliphatische Aldehyde und Ketone
120. Zur Konstitution des „Diformazyls”: 5-[Bis(phenylazo)methylen]-1,3-diphenyltetrazolin-Betain
121. Synthesis of four new meso-ionic heterocyclic systems
122. Cyclic meso-ionic compounds. Part 19. The reaction of 5-ethoxy-1,2,3,4-tetrazolium and 5-ethoxy-1,2,3,4-thiatriazolium tetrafluoroborates with nucleophiles. The preparation of 1,2,3,4-tetrazolium- and 1,2,3,4-thiatriazolium-5-dicyanomethylides
123. 5-Oxo-1,3?4,2,4-dithiadiazole?A Five-Membered Heterocyclic Ketone
124. Reaktionen von Schwefeldiimiden mit bifunktionellen Säurechloriden, II: Synthesen von 5-Oxo-5H-1,3λ4,2,4-dithiadiazol und 5-Acylimino-5H-1,3λ4,2,4-dithiadiazolen
125. Kristallstruktur von 5-Oxo-1,3λ4,2,4-dithiadiazol, S2N2CO, und seine Addukte mit Lewis-Säuren
126. Die Struktur der Lewis-Säure-Addukte des 5-Oxo-1,3λ4,2,4-dithiadiazols (S2N2CO) am Beispiel des AsF5-Adduktes
127. Cyclische Schwefel-Stickstoff-Verbindungen mit einem Kohlenstoffatom im Ringgerüst
128. 5-(4-Methylbenzoylimino)-5H-1,3λ4,2,4-dithiadiazol
129. Chemistry and crystal structures of 1,3-Bis(4'-bromophenyl)propane- 1,2,3-trione, 3,5-Diphenyl- 1,2-dithiolylium-4-olate and 4-Hydroxy-3,5-diphenyl-1,2-dithiolium perchlorate
130. Cycloadditions and other chemistry of 4-oxygenated pyrazoles
131. The crystal and molecular structure of N-(1,2,3,5-tetramethyl-4-pyrazolio)toluene-p-sulphonamidate, C14H19N3O2S, a mesoionic pyrazole
132. PHYSICOCHEMICAL PROPERTIES AND STRUCTURAL STUDY OF 1,2-DITHIOLYLIUM-4-OLATES AND ISOTHIAZOLIUM-4-OLATES
133. Synthesis of 3,5-Diaryl and 3,5-Dialkyl-1,2-dithiolylium-4-olates
134. Syntheses of 1,2-Dithiole Derivatives
135. Zur Chemie der 3-Aroylimino-3H-1,2-dithiole
136. Mesoionic 1,2,5-thiadiazolium-4-olates
137. Studies on mesoionic compounds. Part 10. Synthesis and chemical properties of mesoionic 1,2,5-thiadiazolium-3-olates
138. 3-Carboxymethylthio-1,5-diphenylformazan: a potential terdentate ligand with unusual properties
139. Nucleophilic substitution on dialkoxy disulfides. II. Reactions with hydrazine derivatives.
140. Reaction of dehydrodithizone with pentacarbonyliron. An unusual transformation involving carbonyl insertion
141. Cycloaddition reactions of dehydrodithizone. X-Ray crystal structures of 5-diethylamino-4-methyl-1-phenyl-3-phenylazopyrazole, 4a,5,6,7,8,8a-hexahydro-6-methyl-8a-morpholino-1-phenyl-3-phenylazo-1H-pyrido[4,3-e][1,3,4]thiadiazine, and 3?-phenyl-5?-phenylazo-2-pyrrolidinospiro-[1H-indene-1,2?(3?H)-[1,3,4]thiadiazole]
142. Formation of spiro[1H-indene-1,2?(3?H)-1,3,4-thiadiazoles] in the cycloaddition of 2-dialkylaminoindenes to dehydrodithizone; X-ray crystal structure of 3?-phenyl-5?-phenylazo-2-pyrrolidino-spiro-[1H-indene-1,2?(3?H)-1,3,4-thiadiazole]
143. Reactions of dehydrodithizone with dimethyl acetylenedicarboxylate and with benzyne. X-Ray crystal structure of azobenzene N-(4,5-bis-methoxycarbonylthiazol-2-yl)imide, a stable dipole
144. Reaction of dehydrodithizone with tetraphenylcyclopentadienone. X-Ray crystal structures of a stable 1,5-dipole, azobenzene N-(cis-3a,6a-dihydro-4-oxo-3a,5,6,6a-tetraphenyl-4H-cyclopentathiazol-2-yl)-imide, and of cis-3a,6a-dihydro-3a,5,6,6a-tetraphenyl-2-phenylazo-4H-cyclopentathiazol-4-one
145. Studies on mesoionic compounds, II. The solvent effect on the electronic absorption spectra of mesoionic 2,3-diaryl-2H-tetrazolium-5-thiolate derivatives
146. NICKEL(II) AND COPPER(II) COMPLEXES OF 2,3-DIPHENYL-2,3-DEHYDROTE TRAZOLIUM-5-THIOLATE (DEHYDRODITHIZONE)
147. Das einfachste Biformazan: 1,1′,5,5′-Tetraphenyl-3,3′-biformazan