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Volumn 15, Issue 38, 2009, Pages 9810-9823

A novel multistep mechanism for the stereocontrolled ring opening of hindered sulfamidates: Mild, green, and efficient reactivity with alcohols

Author keywords

Alcohols; Neighboringgroup effects; Nucleophilic substitution; Reaction mechanisms; Sulfamidates

Indexed keywords

BASIC CONDITIONS; CHEMOSELECTIVE; INVERSION OF CONFIGURATION; MULTI-STEP MECHANISM; NEIGHBORING-GROUP EFFECTS; NUCLEOPHILIC SUBSTITUTION; NUCLEOPHILIC SUBSTITUTION REACTIONS; OXAZOLINIUM; QUATERNARY CENTERS; REACTION CONDITIONS; RING OPENING; RING OPENING REACTION; SYNTHETIC ROUTES;

EID: 70450184675     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.200900710     Document Type: Article
Times cited : (22)

References (135)
  • 6
    • 1542375289 scopus 로고    scopus 로고
    • f) X. E. Hu, Tetrahedron 2004, 60, 2701-2743;
    • (2004) Tetrahedron , vol.60 , pp. 2701-2743
    • Hu, X.E.1
  • 15
    • 0037424821 scopus 로고    scopus 로고
    • and references cited therein
    • a) R. E. Meléndez, W. D. Lubell, Tetrahedron 2003, 59, 2581-2616 and references cited therein;
    • (2003) Tetrahedron , vol.59 , pp. 2581-2616
    • Meléndez, R.E.1    Lubell, W.D.2
  • 63
    • 0001521888 scopus 로고
    • b) K. Fuji, Chem. Rev. 1993, 93, 2037-2066;
    • (1993) Chem. Rev. , vol.93 , pp. 2037-2066
    • Fuji, K.1
  • 73
    • 33644768501 scopus 로고    scopus 로고
    • 2nd ed. (Eds.: E. Juaristi, V. Soloshonok), Wiley, New Jersey
    • e) Enantioselective Synthesis of ß-Amino Acids, 2nd ed. (Eds.: E. Juaristi, V. Soloshonok), Wiley, New Jersey, 2005;
    • (2005) Enantioselective Synthesis of ß-Amino Acids
  • 92
    • 70450158305 scopus 로고    scopus 로고
    • note
    • We assayed the reaction of (R)-1b with a lower amount of methanol (1:10 in volume, 25 equiv with respect to sulfamidate) in other nonnucleophilic and nucleophilic solvents at 80°C As non-nucleophilic solvents, 2,2,2-trifluoroethanol, 1,1,1,3,3,3-hexafluoropropanol, tertbutanol, nitromethane, and toluene were used while water, N,N-dimethylformamide, and dimethylsulfoxide were used as nucleophilic solvents. Unfortunately, with the former the sulfamidate remained unreacted after 24 h of stirring and the latter led to a complex reaction mixture. Only few-butanol allowed us to obtain a discrete conversion of (S)-3b (16% after 24h), but a prolonged heating (one week) decomposed the reactants to give a rather complex mixture.
  • 115
    • 70450147857 scopus 로고    scopus 로고
    • a) For a very recent report on the isolation and reactivity of aziridinium salts, in which the rearrangement to the oxazolinium cation was proposed as a mechanistic pathway, see: H. A. Song, M. Dadwald, Y. Lee, E. Mick, H.-S. Chong, Angew. Chem. 2009, 121, 1354-1356;
    • (2009) Angew. Chem. , vol.121 , pp. 1354-1356
    • Song, H.A.1    Dadwald, M.2    Lee, Y.3    Mick, E.4    Chong, H.-S.5
  • 116
    • 60149103899 scopus 로고    scopus 로고
    • Angew. Chem. Int. Ed. 2009, 48, 1328-1330;
    • (2009) Angew. Chem. Int. Ed. , vol.48 , pp. 1328-1330


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