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Volumn 75, Issue 1, 2008, Pages 1-33

Heteropentalene mesomeric betaines of type C: Progress since the early 1980s

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EID: 43649097473     PISSN: 03855414     EISSN: None     Source Type: Journal    
DOI: 10.3987/REV-07-619     Document Type: Article
Times cited : (7)

References (102)
  • 7
    • 43649102005 scopus 로고
    • 1a this denomination is not recommended
    • 1a this denomination is not recommended
    • (1988) Chem. Abstr. , vol.108 , pp. 55129
  • 8
    • 0000848797 scopus 로고
    • For the first example to be prepared, see [this compound (like type A,B, and D members) was then termed 'heteropentalene with ylidic characteristics:' K.T. Potts, 'The Chemistry of Heterocyclic Compounds: Heteropentalenes,' Vol. 30, ed. by A. Weissberger and E.C. Taylor, John Wiley & Sons, New York, 1977, pp. 317-379]
    • For the first example to be prepared, see. Potts K.T., and Marshall J.C. J Org. Chem. 41 (1976) 129 [this compound (like type A,B, and D members) was then termed 'heteropentalene with ylidic characteristics:' K.T. Potts, 'The Chemistry of Heterocyclic Compounds: Heteropentalenes,' Vol. 30, ed. by A. Weissberger and E.C. Taylor, John Wiley & Sons, New York, 1977, pp. 317-379]
    • (1976) J Org. Chem. , vol.41 , pp. 129
    • Potts, K.T.1    Marshall, J.C.2
  • 9
    • 43649087913 scopus 로고    scopus 로고
    • Bicyclic structures having as β half ring a 1,2,3-triazole or tetrazole unit (8 in all) were not included in this chart because compounds of that kind should ring-open to the valence isomeric diazoalkyl and azidoazoles, respectively (see 'Properties'). - Type C systems with phosphorus in any of the positions (a-e) and (Y) do not seem to have been prepared until now.
    • Bicyclic structures having as β half ring a 1,2,3-triazole or tetrazole unit (8 in all) were not included in this chart because compounds of that kind should ring-open to the valence isomeric diazoalkyl and azidoazoles, respectively (see 'Properties'). - Type C systems with phosphorus in any of the positions (a-e) and (Y) do not seem to have been prepared until now.
  • 10
    • 43649088027 scopus 로고    scopus 로고
    • For the sake of uniformity all derivatives are represented by the same resonance structure.
    • For the sake of uniformity all derivatives are represented by the same resonance structure.
  • 17
    • 70249083919 scopus 로고    scopus 로고
    • Technical University of Braunschweig (Germany)
    • Schneider J.-C. Dissertation (2006), Technical University of Braunschweig (Germany)
    • (2006) Dissertation
    • Schneider, J.-C.1
  • 20
    • 84912639398 scopus 로고    scopus 로고
    • Technical University of Braunschweig (Germany)
    • Holtmann B. Dissertation (1998), Technical University of Braunschweig (Germany)
    • (1998) Dissertation
    • Holtmann, B.1
  • 24
    • 43649093387 scopus 로고
    • Technical University of Braunschweig (Germany)
    • Lembcke A. Dissertation (1985), Technical University of Braunschweig (Germany)
    • (1985) Dissertation
    • Lembcke, A.1
  • 35
    • 43649089852 scopus 로고    scopus 로고
    • 7a needs confirmation.
    • 7a needs confirmation.
  • 70
    • 43649099180 scopus 로고    scopus 로고
    • There are no reports on the derivatives (23′/23′o).
    • There are no reports on the derivatives (23′/23′o).
  • 88
    • 43649105197 scopus 로고    scopus 로고
    • 9c,10 it is assumed that C(3a) of the type C' isomer resonates at δ 150.4.
    • 9c,10 it is assumed that C(3a) of the type C' isomer resonates at δ 150.4.
  • 89
    • 43649096242 scopus 로고    scopus 로고
    • 1b).
    • 1b).
  • 90
    • 43649092685 scopus 로고    scopus 로고
    • 18
    • 18
  • 91
    • 43649103477 scopus 로고
    • Interestingly, the cycloadduct (83) on treatment with triethylamine looses sulfur to give the respective 3-benzylidene-3H pyrrolo[1,2-c]imidazole; this species may undergo ring closure into a tetracycle that is stabilized by dehydrogenation
    • Tsuge O., Kanemasa S., and Hamamoto T. Chem. Lett (1983) 763 Interestingly, the cycloadduct (83) on treatment with triethylamine looses sulfur to give the respective 3-benzylidene-3H pyrrolo[1,2-c]imidazole; this species may undergo ring closure into a tetracycle that is stabilized by dehydrogenation
    • (1983) Chem. Lett , pp. 763
    • Tsuge, O.1    Kanemasa, S.2    Hamamoto, T.3
  • 92
    • 43649105467 scopus 로고    scopus 로고
    • 19
    • 19
  • 93
    • 84945022875 scopus 로고
    • The endo isomer of 89 did not result because of steric hindrance. In addition to dimethyl maleate, dimethyl fumarate and maleoand fumaronitrile were studied; as the reactions were carried out in boiling benzene only, epithio cycloadducts were the sole products (obtained as mixtures of stereoisomers)
    • Tsuge O., Kanemasa S., and Hamamoto T. Chem. Lett (1983) 85 The endo isomer of 89 did not result because of steric hindrance. In addition to dimethyl maleate, dimethyl fumarate and maleoand fumaronitrile were studied; as the reactions were carried out in boiling benzene only, epithio cycloadducts were the sole products (obtained as mixtures of stereoisomers)
    • (1983) Chem. Lett , pp. 85
    • Tsuge, O.1    Kanemasa, S.2    Hamamoto, T.3
  • 94
    • 43649105746 scopus 로고    scopus 로고
    • 37a (Scheme 11).
    • 37a (Scheme 11).
  • 96
    • 43649103892 scopus 로고    scopus 로고
    • 1c
    • 1c
  • 97
    • 43649092552 scopus 로고    scopus 로고
    • 61
    • 61
  • 98
    • 0012617777 scopus 로고
    • Chem. Abstr.,1977, 86, 89707. - Obviously the authors did not set out to deprotonate the compound; this would have given the free base of [1,2,4]triazolo[3,4-a]isoindole: an unknown tricyclic congener of system (3)
    • Babichev F.S., Romanov N.N., and Shmailova V.P. Ukr. Khim. Zh. (Russ. Ed.) 42 (1976) 1159 Chem. Abstr.,1977, 86, 89707. - Obviously the authors did not set out to deprotonate the compound; this would have given the free base of [1,2,4]triazolo[3,4-a]isoindole: an unknown tricyclic congener of system (3)
    • (1976) Ukr. Khim. Zh. (Russ. Ed.) , vol.42 , pp. 1159
    • Babichev, F.S.1    Romanov, N.N.2    Shmailova, V.P.3
  • 101
    • 0000267058 scopus 로고
    • This unexpected valence isomerism was first observed with the type C' isomers of series (4)
    • This unexpected valence isomerism was first observed with the type C' isomers of series (4). Moderhack D., and Decker D. Heterocycles 37 (1994) 683
    • (1994) Heterocycles , vol.37 , pp. 683
    • Moderhack, D.1    Decker, D.2


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.