Second Generation Synthesis of C27−C35 Building Block of E7389, a Synthetic Halichondrin Analogue
作者:Yu-Rong Yang、Dae-Shik Kim、Yoshito Kishi
DOI:10.1021/ol9016589
日期:2009.10.15
A practical method is reported to synthesize E7389 C27−C35 building block 13 from 1,2-O-isopropylidene-α-d-5-deoxyglucurono-6,3-lactone (3). This synthesis relies on two key processes: (1) C34/C35-diol is introduced via asymmetric dihydroxylation with dr = 3:1, with the undesired C34-diastereomer effectively removed by crystallization of 11, and (2) the C30 PhSO2CH2 group is introduced stereoselectively
INTERMEDIATE FOR PREPARING ERIBULIN MESYLATE AND METHOD FOR PREPARING SAME
申请人:Yonsung Fine Chemical Co., Ltd.
公开号:EP3712141A1
公开(公告)日:2020-09-23
The present invention relates to a process for preparing a compound of formula (6) which is an intermediate for the preparation of eribulin mesylate with high yields and high purity, and an intermediate therefor.
Intermediate for preparing eribulin mesylate and process for preparing the same
申请人:YONSUNG FINE CHEMICAL CO., LTD.
公开号:US11142509B2
公开(公告)日:2021-10-12
The present invention relates to a process for preparing a compound of formula (6) which is an intermediate for the preparation of eribulin mesylate with high yields and high purity, and an intermediate therefor.