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Volumn 62, Issue 3, 1997, Pages 584-594

Catalytic, Enantioselective Cyclopropanation of Allylic Alcohols. Substrate Generality

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EID: 0001469016     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo961859v     Document Type: Article
Times cited : (126)

References (54)
  • 12
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    • Unpublished results
    • Studies from these laboratories with chiral nonracemic bisoxazolines as ligands for palladium in the cyclopropanation of olefins with diazomethane yielded only racemic cyclopropanes. Edwards, J. P.; Faucher, A. M.; Stavenger, R. Unpublished results.
    • Edwards, J.P.1    Faucher, A.M.2    Stavenger, R.3
  • 34
    • 85033126896 scopus 로고    scopus 로고
    • note
    • While it is conceivable that bis(iodomethyl)zinc could also form alkoxides, the results were less than encouraging. The reaction of cinnamyl alcohol with 2 equiv of preformed bis(iodomethyl)zinc proceeded very slowly and, in the presence of 0.1 equiv of 7, was also less selective. Either deprotonation is not taking place or the (iodomethyl)zinc alkoxide that is formed is much less reactive than the corresponding ethylzinc alkoxide.
  • 36
    • 0001030014 scopus 로고
    • 21b (a) Bordwell, F. G.; Branca, J. C.; Highes, D. L.; Olmstead, W. N. J. Org. Chem. 1980, 45, 3305. (b) Murto, J. Acta Chem. Scand. 1964, 18, 1043.
    • (1964) Acta Chem. Scand. , vol.18 , pp. 1043
    • Murto, J.1
  • 37
    • 0000903698 scopus 로고
    • (a) ( - )-17 has been assigned as (1R,2R), Keiderling, T. A.; Yasui, S. C. J. Am. Chem. Soc. 1987, 109, 2311. Sugita, T.; Inouye, Y. Bull. Chem. Soc. Jpn. 1966, 39, 1075.
    • (1987) J. Am. Chem. Soc. , vol.109 , pp. 2311
    • Keiderling, T.A.1    Yasui, S.C.2
  • 38
    • 1542532298 scopus 로고
    • (a) ( - )-17 has been assigned as (1R,2R), Keiderling, T. A.; Yasui, S. C. J. Am. Chem. Soc. 1987, 109, 2311. Sugita, T.; Inouye, Y. Bull. Chem. Soc. Jpn. 1966, 39, 1075.
    • (1966) Bull. Chem. Soc. Jpn. , vol.39 , pp. 1075
    • Sugita, T.1    Inouye, Y.2
  • 40
    • 85033146700 scopus 로고    scopus 로고
    • ( - )-19 has been assigned as (1R,2R), ref 18a
    • (c) ( - )-19 has been assigned as (1R,2R), ref 18a.
  • 41
    • 85033145948 scopus 로고    scopus 로고
    • note
    • Careful monitoring of the reactions with and without added zinc iodide have shown a time dependence of enantioselectivity along with the elimination of the induction period.
  • 42
    • 85033141396 scopus 로고    scopus 로고
    • note
    • All transfers of neat diethylzinc were performed using microliter syringes.
  • 43
    • 0000151113 scopus 로고
    • Wilkinson, G., Ed.; Pergamon Press: New York, Chapter 16
    • Boersma, J. In Comprehensive Organometallic Chemistry; Wilkinson, G., Ed.; Pergamon Press: New York, 1982; Vol. 2, Chapter 16.
    • (1982) Comprehensive Organometallic Chemistry , vol.2
    • Boersma, J.1
  • 46
    • 85033137673 scopus 로고    scopus 로고
    • note
    • (b) We wish to thank Professor Seebach for kindly providing us with the details of their diethylzinc distillation.
  • 50
    • 37049115338 scopus 로고
    • 3 is tetrameric in the solid state. X-ray structures : (a) Shearer, H. M. M.; Spencer, C. B. Chem. Commun. 1966, 194. (b) Shearer, H. M. M.; Spencer, C. B. Acta Crystallogr., Sect. B: Crystallogr. Cryst. Chem. 1980, 36, 2046.
    • (1966) Chem. Commun. , pp. 194
    • Shearer, H.M.M.1    Spencer, C.B.2
  • 52
    • 85033131058 scopus 로고    scopus 로고
    • note
    • We have attempted to grow crystals of a variety of bissulfonamides such as 31 with various combinations of solvent, temperature, concentration, and by the addition of both mono- and bidentate ligands for zinc (i.e., TMEDA). Invariably, no crystals were formed, and the solutions became viscous and gellike or a fine powder was formed. This suggests to us that the sulfonamide-zinc species such as 48 are self-associating to form polymeric networks. The zinc of one sulfonamide-zinc complex can be envisioned to coordinate the sulfonyl oxygen of another followed by additional such interactions to form a large networklike structure.


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