Enantioselective Total Synthesis of (+)-Colletoic Acid via Catalytic Asymmetric Intramolecular Cyclopropanation of an α-Diazo-β-keto Diphenylphosphine Oxide
作者:Takashi Sawada、Masahisa Nakada
DOI:10.1021/ol303459x
日期:2013.3.1
The enantioselective total synthesis of (+)-colletoic acid, a potent naturally occurring 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) inhibitor, is described. This total synthesis features a highly enantioselective catalytic asymmetric intramolecular cyclopropanation of an α-diazo-β-keto diphenylphosphine oxide and five highly stereoselective reactions (cyclopropane opening, Diels–Alder reaction
描述了对映体全合成的(+)-
草酸,一种有效的天然11β-羟基类
固醇脱氢酶1型(11β-H
SD1)
抑制剂。该总合成具有α-重氮-β-酮基
二苯基膦氧化物的高度对映选择性催化不对称分子内
环丙烷化和五个高度立体选择性反应(
环丙烷开口,Diels-Alder反应,
碘内酯化,烯烃形成以及α,β-不饱和
羧酸的还原)酸)。