Bidirectional Asymmetric Allylboration. A Convenient Asymmetric Synthesis of <i>C</i><sub>2</sub>-Symmetric 3-Methylenepentane-1,5-diols and Rapid Access to <i>C</i><sub>2</sub>-Symmetric Spiroketals
作者:Anthony G. M. Barrett、D. Christopher Braddock、Pieter D. de Koning、Andrew J. P. White、David J. Williams
DOI:10.1021/jo991205x
日期:2000.1.1
single-crystal X-ray study of bis-Mosher ester 6g. Desymmetrization and further functionalization of diol 1a were achieved by treatment of the bis-BOC carbonate 13 with IBr in toluene at -80 degrees C to give cyclic iodocarbonate 14 as a single diastereomer. This methodology is also applicable in natural product synthesis; enantiomerically pure spiroketals 1,7-dioxaspiro[5.5]undecanes 18 and 25, the latter
Chiral synthesis via organoboranes. 6. Asymmetric allylboration via chiral allyldialkylboranes. Synthesis of homoallylic alcohols with exceptionally high enantiomeric excess
作者:Prabhakar K. Jadhav、Krishna S. Bhat、P. Thirumalai Perumal、Herbert C. Brown
DOI:10.1021/jo00354a003
日期:1986.2
Asymmetric methallylboration of prochiral aldehydes with methallyldiisopinocampheylborane·synthesis of 2-methyl-1-alken-4-ols in ≥ 90% enantiomeric purities
作者:Herbert C. Brown、Prabhakar K. Jadhav、P.Thirumalai Perumal
DOI:10.1016/s0040-4039(01)81537-9
日期:1984.1
BROWN, H. C.;JADHAV, P. K.;PERUMAL, P. T., TETRAHEDRON LETT., 1984, 25, N 45, 5111-5114