Asymmetric synthesis of naturally occurring (−)-seimatopolides A and B
作者:Rohan Kalyan Rej、Pratik Pal、Samik Nanda
DOI:10.1016/j.tet.2014.05.021
日期:2014.7
Asymmetric totalsynthesis of polyhydroxylated naturally occurring nonenolide seimatopolide A (3S,6S,7S,9R) and seimatopolide B (3S,6R,9R) is described in this article. An E-selective cross metathesis (CM) reaction between two suitable fragments followed by macrolactonization reaction is the main highlight of our synthesis for the two natural products. The fragment containing 6S,7S,9R stereocenters
The totalsynthesis of (−)-seimatopolide A is described in a linear fashion with high yielding steps. The key reactions include Lu’s isomerization, Sharpless asymmetric dihydroxylation and Kita’s macrolactonization.