Journal of the American Chemical Society, Vol.131, No.34, 12109-12109, 2009
Total Synthesis of (+)-Sorangicin A
The final synthetic challenges associated with (+)-sorangicin A have been overcome, thus leading to the first total synthesis of this complex macrolide antibiotic. Highlights of the highly convergent synthesis include two Julia-Kocienski olefinations to unite three advanced fragments with high E-stereoselectivity. Critical to the final-stage success was the use of a carefully defined Stille coupling and a Mukaiyama macrolactonization as well as Lewis and protic acid-promoted deprotections carefully designed to suppress E/Z isomerization and/or destruction of the delicate (Z,Z,E)-trienoate linkage.