Total Synthesis of 2‘-O-Methylmyxalamide D and (6E)-2‘-O-Methylmyxalamide D
摘要:
Hetero-bis-metalated 1,3,5-hexatrienes are employed in the linchpin coupling of synthetic fragments for the convergent construction of the central pentaene of the antifungal agent 2'-O-methylmyxalamide D and its (6E) isomer. Sequential Stille and Suzuki-Miyaura couplings interpolate the boron/tin triene into the pentaene chain. The total synthesis of O-methylmyxalamide D and its (6E) isomer was accomplished efficiently.
Total Synthesis of (−)-Spirangien A, an Antimitotic Polyketide Isolated from the Myxobacterium<i>Sorangium Cellulosum</i>
作者:Ian Paterson、Alison D. Findlay、Christian Noti
DOI:10.1002/asia.200800445
日期:2009.4.6
A stereocontrolled total synthesis of the cytotoxic spiroacetal‐containing polyketide (−)‐spirangien A is described. This utilizes an aldol‐based strategy to construct a common stereotetrad intermediate that was elaborated into the spiroacetal core, followed by the introduction of the unstable pentaene‐containing side chain, performed with exclusion of light, using sequential Stille cross‐coupling