Enantioselective total synthesis of (−)-pseudophrynaminol through tandem olefination, isomerization and asymmetric Claisen rearrangement
作者:Tomomi Kawasaki、Atsuyo Ogawa、Yasuyuki Takashima、Masanori Sakamoto
DOI:10.1016/s0040-4039(03)00065-0
日期:2003.2
A new and efficient total synthesis of (−)-pseudophrynaminol, the pyrrolo[2,3-b]indole alkaloid bearing the allylic moiety at the 3a-position, has been achieved by a sequence involving 3-allylindol-2-one 8 as a key intermediate. The enantioselective construction of the quaternary carbon in 8 was performed through a tandem cascade reaction of 2-allyloxyindolin-3-one 4, olefination, isomerization, and
( - ) -的一种新的和有效的总合成pseudophrynaminol中,吡咯并[2,3- b ]吲哚生物碱轴承在图3a-位置烯丙基部分,已经通过涉及3- allylindol -2-酮的序列来实现8如关键中间体。通过2-烯丙氧基吲哚-3-一4的串联级联反应,烯化,异构化和不对称克莱森重排进行8中四元碳的对映选择性结构。