First total synthesis of optically pure methyl (2Z, 8S, 9R)-8,9-epoxydeca-4,6-diyn-2-en-10-hydroxy-1-oate and its acetate, two naturally-occurring antifeedants
摘要:
The first total synthesis of the naturally occurring antifeedants 1a, and 1b is described, starting from optically pure (2S, 3R)-4-butyryloxy-2,3-epoxybutan-1-ol 2. (2R, 3S)-5-Bromo-2,3-epoxy-4-pentyn-1-ol 4 is the key intermediate in the synthesis.
Influence of ester chain length, enzyme, and physical parameters on lipase-catalysed hydrolyses of meso-oxiranedimethanol esters. Part 2
摘要:
A range of meso-oxiranedimethanol diesters were prepared and subjected to hydrolysis by a selection of microbial and porcine-derived lipases. The best chain length was then subjected to a wider range of lipases. The physical reaction parameters were further investigated for the best enzyme/substrate combination. The results revealed the effects of ester chain length, choice of enzyme, and physical reaction parameters on the enzymic hydrolysis. Using a combination of the these three variables, it is demonstrated that this is a versatile approach for the optimisation of an enzymic hydrolysis for a given substrate. Additionally, we also report on an efficient, multigram synthesis of oxiranedimethanol diesters from cheap achiral precursors, their successful enzymic hydrolyses to alcohols in good chemical yield and e.e., and their conversion to synthetically useful aldehydes in high yield. Both enantiomeric series can readily be accessed from a single enzymic hydrolysis result. (C) 2000 Elsevier Science Ltd. All rights reserved.
Chuche, Josselin; Grandjean, Didier; Pale , Patrick, Bulletin des Societes Chimiques Belges, 1992, vol. 101, # 5, p. 415 - 432
作者:Chuche, Josselin、Grandjean, Didier、Pale , Patrick
DOI:——
日期:——
Influence of ester chain length, enzyme, and physical parameters on lipase-catalysed hydrolyses of meso-oxiranedimethanol esters. Part 2
作者:Jonathan D Moseley、James Staunton
DOI:10.1016/s0957-4166(00)00276-7
日期:2000.8
A range of meso-oxiranedimethanol diesters were prepared and subjected to hydrolysis by a selection of microbial and porcine-derived lipases. The best chain length was then subjected to a wider range of lipases. The physical reaction parameters were further investigated for the best enzyme/substrate combination. The results revealed the effects of ester chain length, choice of enzyme, and physical reaction parameters on the enzymic hydrolysis. Using a combination of the these three variables, it is demonstrated that this is a versatile approach for the optimisation of an enzymic hydrolysis for a given substrate. Additionally, we also report on an efficient, multigram synthesis of oxiranedimethanol diesters from cheap achiral precursors, their successful enzymic hydrolyses to alcohols in good chemical yield and e.e., and their conversion to synthetically useful aldehydes in high yield. Both enantiomeric series can readily be accessed from a single enzymic hydrolysis result. (C) 2000 Elsevier Science Ltd. All rights reserved.
First total synthesis of optically pure methyl (2Z, 8S, 9R)-8,9-epoxydeca-4,6-diyn-2-en-10-hydroxy-1-oate and its acetate, two naturally-occurring antifeedants
作者:D. Grandjean、P. Pale、J. Chuche
DOI:10.1016/s0040-4039(00)79091-5
日期:1992.9
The first total synthesis of the naturally occurring antifeedants 1a, and 1b is described, starting from optically pure (2S, 3R)-4-butyryloxy-2,3-epoxybutan-1-ol 2. (2R, 3S)-5-Bromo-2,3-epoxy-4-pentyn-1-ol 4 is the key intermediate in the synthesis.