A Shimizu Non-Aldol Approach to the Formal Total Synthesis of Palmerolide A
作者:Sandip A. Pujari、Parthasarathy Gowrisankar、Krishna P. Kaliappan
DOI:10.1002/asia.201100429
日期:2011.11.4
A formaltotalsynthesis of palmerolide A has been accomplished by assembling three fragments by means of successive Julia–Kocienski olefination, Yamaguchi esterification, and ring‐closing metathesis (RCM). Our initial efforts to combine the first two fragments through a Julia–Kocienski reaction between a secondary sulfone and a ketone were not successful; nevertheless, it was feasible between a primary
Asymmetric synthesis of putaminoxin, a phytotoxic macrolide from the cultured dinoflagellate Amphidinium sp., has been accomplished. Absolute configuration of putaminoxin was concluded to be 1 from comparison of the NMR data and [α]D values of synthetic and natural putaminoxin.
Synthesis of the C1–C15 fragment of palmerolide A via protecting group dependent RCM reaction
作者:Bighnanshu K. Jena、Debendra K. Mohapatra
DOI:10.1016/j.tetlet.2013.04.069
日期:2013.6
The steric effect of protecting groups on the outcome of the ring-closing metathesis reaction has been studied for the construction of key 13-membered macrolactone. The protocol has been successfully utilized for the synthesis of C1-C15 fragment of palmerolide A in a highly convergent and concise manner. (C) 2013 Elsevier Ltd. All rights reserved.