作者:Norbert Sewald、Stefan Eißler、Beate Neumann、Hans-Georg Stammler
DOI:10.1055/s-2007-1000868
日期:2008.1
Unit A of cryptophycin 1 is a δ-hydroxy acid with four stereogenic centres. Our unit A synthesis introduces the first two stereogenic centres by a catalytic, asymmetric dihydroxylation, whereas the remaining two stereogenic centres are established by diastereoselective reactions. In this letter, we focus on the diastereoselectivity of these reactions and discuss the accessibility of cryptophycin unit A diastereomers.
Cryptophycin 1 的 A 单元是一种具有四个立构中心的 δ-羟基酸。我们的A单元合成通过催化、不对称二羟基化引入前两个立体中心,而其余两个立体中心通过非对映选择性反应建立。在这封信中,我们重点关注这些反应的非对映选择性,并讨论隐藻素 A 单元非对映异构体的可及性。