Medium ring heterocycles: transamidation reactions of β-lactams
作者:Leslie Crombie、Raymond C. F. Jones、Steven Osborne、Ab. Rasid Mat-Zin
DOI:10.1039/c39830000959
日期:——
Seven-, eight-, and nine-membered azalactams are easily prepared from azetidin-2-ones by transamidation via N-(halogenoalkyl) derivatives.
七元,八元和九元的氮杂内酰胺很容易由氮杂环丁烷-2-酮经N-(卤代烷基)衍生物进行氨基转移而制得。
PROCESS FOR THE SYNTHESIS OF CARBAPENEM INTERMEDIATES, AND COMPOUNDS PRODUCED
申请人:——
公开号:US20010025103A1
公开(公告)日:2001-09-27
An efficient method for the synthesis of a compound of formula 2:
1
is disclosed which comprises reacting a 4-acyl-2-azetidinone with a titanium, zirconium or hafnium enolate of a 1-hydroxy-2-butanone derivative.
Oxidation and reduction method to produce 4-acyloxyazetidin-2-one
申请人:MERCK & CO. INC.
公开号:EP0404584A2
公开(公告)日:1990-12-27
The 4-acyloxyazetidin-2-ones, which are intermediates in the production of carbapenems and penems, are produced from 4-furanylazetidin-2-ones by a sequential oxidation-reduction-oxidation reaction scheme.