A cyclopropanol approach to the synthesis of both enantiomers of the C13–C21 fragment of epothilones
摘要:
Efficient syntheses of both enantiomers of the C13-C21 fragment of epothilone molecules have been performed by use of enantiomeric oxiranyl-substituted cyclopropylsulfonates as key intermediates. The latter were obtained by the cyclopropanation of easily available (R)-methyl 2,3-O-isopropylideneglycerate and subsequent manipulation of the functional groups. Asymmetric allylation of 1-formylcyclopropyl pivalate led to an alternative precursor of the target compounds with moderate enantioselectivity. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis of epothilone D with the forced application of oxycyclopropane intermediates
作者:A. L. Hurski、O. G. Kulinkovich
DOI:10.1134/s1070428011110029
日期:2011.11
The total synthesis of epothilone D with six-fold application in the intermediate stages of successive cyclopropanation — opening or cleavage of the three-membered ring was performed. These transformations underlie the new stereoselective method developed for coupling fragments C7–C12 and C13–C21 in the target molecule.
A cyclopropanol approach to the synthesis of both enantiomers of the C13–C21 fragment of epothilones
作者:Alaksiej L. Hurski、Nikolai A. Sokolov、Oleg G. Kulinkovich
DOI:10.1016/j.tet.2009.02.003
日期:2009.4
Efficient syntheses of both enantiomers of the C13-C21 fragment of epothilone molecules have been performed by use of enantiomeric oxiranyl-substituted cyclopropylsulfonates as key intermediates. The latter were obtained by the cyclopropanation of easily available (R)-methyl 2,3-O-isopropylideneglycerate and subsequent manipulation of the functional groups. Asymmetric allylation of 1-formylcyclopropyl pivalate led to an alternative precursor of the target compounds with moderate enantioselectivity. (C) 2009 Elsevier Ltd. All rights reserved.