Revision of Absolute Configuration of Enantiomeric (Methylenecyclopropyl)carbinols Obtained from (<i>R</i>)-(−)- and (<i>S</i>)-(+)-Epichlorohydrin and Methylenetriphenylphosphorane. Implications for Reaction Mechanism and Improved Synthesis of Antiviral Methylenecyclopropane Analogues of Nucleosides
作者:Xinchao Chen、Jiri Zemlicka
DOI:10.1021/jo010511j
日期:2002.1.1
reaction of (R)- and (S)-epichlorohydrin 5 with methylenetriphenylphosphorane or resolution of the corresponding oxaphospholane 6 via a salt with L-(+)-tartaric acid and subsequent Wittig transformation with formaldehyde were revised. The (-)-oxaphospholane 6 has the S,S and (-)-(methylenecyclopropyl)carbinol (4) the R configuration. The configurations of (+)-6 and (+)-4 are then R,R and S, respectively
Methylenecyclopropane Analogues of Nucleosides: Synthesis, Absolute Configuration, and Enantioselectivity of Antiviral Effect of (<i>R</i>)-(-)- and (<i>S</i>)-(+)-Synadenol
作者:Y-L. Qiu、A. Hempel、N. Camerman、A. Camerman、F. Geiser、R. G. Ptak、J. M. Breitenbach、T. Kira、L. Li、E. Gullen、Y-C. Cheng、J. C. Drach、J. Zemlicka
DOI:10.1080/15257779908041507
日期:1999.4
Synthesis, absoluteconfiguration and antiviral activity of enantiomeric antiviral agents (R)-(-)- and (S)-(+)-synadenol (2 and 3a) are described.