METHODS AND INTERMEDIATES FOR PREPARING MACROLACTAMS
申请人:XU Feng
公开号:US20160251375A1
公开(公告)日:2016-09-01
The present invention includes compounds useful as intermediates in the preparation of macrolactams, methods for preparing the intermediates, and methods for preparing macrolactams. One use of the methods and intermediates described herein is in the production of macrolactam compounds able to inhibit HCV NS3 protease activity. HCV NS3 inhibitory compounds have therapeutic and research applications.
Asymmetric Synthesis of Functionalized <i>trans-</i>Cyclopropoxy Building Block for Grazoprevir
作者:Feng Xu、Yong-Li Zhong、Hongming Li、Ji Qi、Richard Desmond、Zhiguo J. Song、Jeonghan Park、Tao Wang、Matthew Truppo、Guy R. Humphrey、Rebecca T. Ruck
DOI:10.1021/acs.orglett.7b02867
日期:2017.11.3
A practical and asymmetric synthesis of a functionalized trans-cyclopropoxy buildingblock for the preparation of the HCV NS3/4a protease inhibitor grazoprevir is reported. Intramolecular SN2 displacement–ring closure, followed by a Baeyer–Villiger oxidation, yields the desired trans-cyclopropanol with full control of diastereoselectivity. A terminal alkyne is then effectively installed using LiNH(CH2)2NEt2
报道了用于制备HCV NS3 / 4a蛋白酶抑制剂格拉佐普韦的官能化反式-环丙氧基结构单元的实用和不对称合成。分子内S N 2置换-环闭合,然后进行Baeyer-Villiger氧化,可制得所需的反式-环丙醇,并完全控制非对映选择性。然后使用LiNH(CH 2)2 NEt 2有效地安装末端炔烃。从(S)-表氯醇开始,以51%的总收率制备了环丙氧基结构单元,光学纯度> 99.8%,无需分离任何中间体。
Synthesis of 2,6-disubstituted piperidine alkaloids from ladybird beetles Calvia 10-guttata and Calvia 14-guttata
Optically pure (+)-calvine, (+)-2-epicalvine, (2S,6S)-(6-pentylpiperidin-2-yl)acetic acid methyl ester and (2R,6S)-(6-pentylpiperidin-2-yl)acetic acid methyl ester, four piperidine alkaloids isolated from ladybird beetles of the genus Calvia (Coccinellidae), were synthesised from a common precursor using cyclisative Pd(II)/Cu(II)-catalysed carboamination-(methoxy)carbonylation tandem reaction of alkenylamines