Stereoselective synthesis of hydroxylated 3-aminoazepanes using a multi-bond forming, three-step tandem process
作者:Sajjad Ahmad、Andrew Sutherland
DOI:10.1039/c2ob26544c
日期:——
A multi-bond forming, three-step tandem process involving a palladium(II)-catalysed Overman rearrangement and a ring closing metathesis reaction has been utilised for the efficient synthesis of a 2,3,6,7-tetrahydro-3-amidoazepine. Substrate directed epoxidation or dihydroxylation of this synthetic intermediate has allowed the diastereoselective synthesis of hydroxylated 3-aminoazepanes including the
多键形成,三步串联工艺涉及钯(II)催化的超曼重排和闭环易位反应,已被用于有效合成2,3,6,7-四氢-3-酰胺基氮杂。该合成中间体的底物直接环氧化或二羟基化使得非对映选择性地合成了羟基化的3-氨基氮杂环戊烷,包括巴拉诺尔核心的顺式-非对映异构体。2,3,6,7-四氢-3-酰胺基氮杂基序的不对称合成也可以通过在Overman重排过程中使用手性钯(II)催化剂来实现。