作者:Nicholas A. Morra、Brian L. Pagenkopf
DOI:10.1016/j.tet.2013.07.026
日期:2013.10
Subsequent manipulations, including a Still–Gennari olefination, Sharpless asymmetric dihydroxylation, Corey–Fuchs alkynylation, and Kazmaier hydrostannylation provided the fully functionalized C(1)–C(9) fragment 2 suitable for cross-coupling. The sequence is readily scalable and provides gram quantities of 2.
通过关键的一个碳同源性,通过Sharpless不对称环氧化制备的烯丙基顺式环氧化物以九个步骤和41%的总产率转化为环化前体4。的钴催化的需氧氧化环4得到的反式,94%收率-THF在克规模。随后的操作,包括Still–Gennari烯化,Sharpless不对称二羟基化,Corey–Fuchs炔基化和Kazmaier加氢甲锡化,提供了适用于交叉偶联的完全官能化的C(1)–C(9)片段2。该序列易于扩展,并提供2的克数量。