Synthesis of the stereoisomers of the methylesters of 3-isopropyl-5-methoxy-6-ketoheptanoic acid and of 2-methoxy-4-isopropylhexandioic acid
作者:R. Grandi、U.M. Pagnoni、R. Trave、L. Garanti
DOI:10.1016/s0040-4020(01)97380-6
日期:1974.1
The four stereoisomers of 3-isopropyl-5-methoxy-6-ketoheptanoic acid methylester and those of 2-methoxy-4-isopropylhexandioic acid methylester were synthesized fromR(−)- and S(+)-carvone. The combined data given provide a basis for specific enantiomer assignment to natural product degradation materials.
Chemo- and stereoselective reduction of α,β-epoxyketones with diisopropoxytitanium(III) tetrahydroborate
作者:K.S Ravikumar、Srinivasan Chandrasekaran
DOI:10.1016/0040-4020(96)00465-6
日期:1996.7
Reduction of α,β-epoxyketones with diisopropoxytitanium(III) tetrahydroborate in dichloromethane under mild conditions (−78° → −20°C) provides anti- (or erythro-) α,β-epoxy alcohols in high yields with high degree of chemo- and stereoselectivity.