Stereoselective Total Synthesis of (+)-Nephrosteranic Acid and (+)-Roccellaric Acid through Asymmetric Dihydroxylation and Johnson-Claisen Rearrangement
作者:Rodney A. Fernandes、Asim K. Chowdhury
DOI:10.1002/ejoc.201001419
日期:2011.2
efficient stereoselectivetotalsynthesis of (+)-nephrosteranicacid and (+)-roccellaricacid is presented. The synthetic strategy features the regioselective asymmetricdihydroxylation of the γ,δ-olefinic bond of a α,β,γ,δ-unsaturated ester and the Johnson–Claisenrearrangement as the key steps. The synthesis is achieved in 10 steps and 6.8 % (nephrosteranic acid) and 7.6 % (roccellaric acid) overall
Concise total synthesis of cytotoxic natural products (+) and (-)-muricatacin
作者:Srinivasarao Yaragorla、Ramaiah Muthyala
DOI:10.3998/ark.5550190.0011.a15
日期:——
A short and efficient total synthesis of antitumor natural products (+) and (-)-muricatacin is described in four steps with an overall yield of 47%. The key reactions involved in the synthesis are Ph3P mediated isomerization and asymmetric dihydroxylation.