Stereoselective synthesis of basiliskamides A and B via Prins cyclisation
摘要:
A stereoselective and convergent approach to basiliskamides A and B is achieved through our recently developed strategy for the construction of polyketide precursors via Prins cyclisation. The approach mainly relies upon reductive opening of 1-iodomethyl cyclic ethers, Mitsunobu inversion, Takai olefination and Stille coupling along with Prins cyclisation. (c) 2008 Elsevier Ltd. All Fights reserved.
Determination of the absolute stereochemistry of the antifungal antibiotic YM-47522 by the total synthesis of its enantiomer
作者:Mikhail S. Ermolenko
DOI:10.1016/s0040-4039(96)01466-9
日期:1996.9
The enantiomer 1 of the new antifungal antibiotic YM-47522 has been synthesized and found to be the antipode of the natural product. Thus, the absolutestereochemistry of the naturally occurring antibiotic YM-47522 was determined to be (7S, 8S, 9R, 10S).
The total synthesis of the polyketideantibiotic (−)-basiliskamide B is described. The convergent asymmetric synthesis relies on the use of a diastereoselective ethyl ketone aldol reaction followed by a syn selective reduction of a β-hydroxy ketone and a Stille cross-coupling between a Z-vinylstannane and an E-vinyl iodide to establish the (Z,E)-dienamide moiety.
Process for producing 2-carbon-substituted carbapenem derivatives
申请人:Banyu Pharmaceutical Co., Ltd.
公开号:US05258509A1
公开(公告)日:1993-11-02
A process for producing a 2-(unsubstituted or carbon-substituted)-1-carbapen-2-em-3-carboxylic acid derivative, which comprises reacting a 2-trifluoromethanesulfonyloxy-1-carbapen-2-em-3-carboxylic acid derivative or the 1-carbapen-2-em-3-carboxylic acid derivative derived from a 2-oxo-1-carbapenam-3-carboxylic acid derivative and trifluoromethanesulfonic anhydride, and a stannane derivative in an inert solvent in the presence of a palladium compound and a salt.
作者:Darren J. Lipomi、Neil F. Langille、James S. Panek
DOI:10.1021/ol048574m
日期:2004.9.1
The first enantioselective synthesis of the polyketide antibiotics basiliskamides A and B, which exhibit potent in vivo activity against Candida albicans and Aspergillus fumigatus, has been achieved. Serial asymmetric crotylsilane and crotylboronate additions established the C7-C10 stereochemical tetrad. Takai iodoolefination and palladium-mediated cross-coupling were used to install the (Z,E)-vinyl acrylamide. Spectroscopic data is consistent with the assignment of the absolute configurations of the natural products as (7S,8S,9R,10S).
Total synthesis of (-)-basiliskamide A and NMR studies on the conversion of basiliskamide A to basiliskamide B
作者:Luiz C. Dias、Caroline C. S. Gonçalves
DOI:10.1590/s0103-50532010001000030
日期:——
We describe herein our approach to the total synthesis of the antifungal polyketide (-)- basiliskamide A, as well as H-1 NMR studies on the migration of the cinnamoyl side chain of basiliskamide A to form basiliskamide B in CDCl3 solution.