作者:Lynda J. Brown、Ian B. Spurr、Stephen C. Kemp、Nicholas P. Camp、Karl R. Gibson、Richard C. D. Brown
DOI:10.1021/ol800767e
日期:2008.6.1
An asymmetric total synthesis of (+)-cis-sylvaticin is described. Key steps include the use of permanganate-mediated oxidative cyclization of 1,5-dienes to synthesize the two major fragments 2 and 3 and a catalytically efficient tethered RCM to unite these THF-containing fragments. In addition, t-BuP 4 base was found to reliably promote rapid alkylation of the butenolide precursor fragment 4.
描述了(+)-顺式-sylvaticin的不对称全合成。关键步骤包括使用高锰酸盐介导的1,5-二烯的氧化环化反应合成两个主要片段2和3,以及使用催化有效的束缚RCM结合这些含THF的片段。另外,发现t-BuP 4碱能可靠地促进丁烯内酯前体片段4的快速烷基化。