A novel synthetic route has been reported for the synthesis of nonenolide. The syntheses of fragments were initiated from commercially available and inexpensive starting materials. The synthesis involves key steps like Sharpless epoxidation, Jacobsen's resolution, lactonization, and cross‐metathesis.
Total synthesis of decarestrictine I and botryolide B via RCM protocol
作者:Palakodety Radha Krishna、T. Jagannadha Rao
DOI:10.1039/c004556j
日期:——
A convergent stereoselectivetotalsynthesis of decarestrictineI (1) and botryolide B (1a) invoking a common synthetic strategy is reported. The key steps are: ring-closing metathesis of epoxy dienoic esters obtained through the Yamaguchi esterification of their respective intermediates to furnish the respective Z-macrocycles (2 and 2a) which were further extrapolated to their respective targets.
A highly convergent stereoselective total synthesis of achaetolide, a ten-membered lactone is described. The ring-closing metathesis reaction was used to construct the macrocycle and E-olefinic moiety in the molecule. The key acid and alcohol fragments were synthesized from a single chiral pool material D-mannitol.
作者:Debendra K. Mohapatra、D. Prabhakar Reddy、Uttam Dash、J.S. Yadav
DOI:10.1016/j.tetlet.2010.11.003
日期:2011.1
We have achieved the synthesis of Z-isomer of phomolide B during our investigation toward the effect of protecting group on the outcome of ring-closing metathesis reaction. The other key reactions involved are cis-selective partial hydrogenation. Sharpless asymmetric epoxidation, Yamaguchi esteritication, and following 12 longest linear sequence with 18.5% overall yield starting from a known intermediate 20. (C) 2010 Elsevier Ltd. All rights reserved.