Process and intermediates for .beta.-lactam antibiotics
申请人:Harvard University
公开号:US04665171A1
公开(公告)日:1987-05-12
1-Benzyl (or substituted benzyl)-3.beta.-[4(S)-aryloxazolidin-2-one-3-yl]-4.beta.-(2-arylvinyl)azet idin-2-ones are provided via cycloaddition of a 4(S)-aryloxazolidin-2-one-3-ylacetyl halide and an imine formed with a benzylamine and a 3-arylacrolein, e.g. cinnamaldehyde. The azetidinones are useful chiral intermediates in an asymmetric synthesis of 1-carba(1-dethia)-3-hydroxy-3-cephem-4-carboxylic acids and esters and to monocyclic .beta.-lactam antibiotics.
Process and intermediates for beta-lactam antibiotics
申请人:President and Fellows of Harvard College
公开号:US04734495A1
公开(公告)日:1988-03-29
1-Benzyl(or substituted benzyl)-3.beta.-[4(S)-aryloxazolidin-2-one-3-yl]-4.beta.-(2-arylvinyl)azet idin-2-ones are provided via cycloaddition of a 4(S)-aryloxazolidin-2-one-3-ylacetyl halide and an imine formed with a benzylamine and a 3-arylacrolein, e.g. cinnamaldehyde. The azetidinones are useful chiral intermediates in an asymmetric synthesis of 1-carba(1-dethia)-3-hydroxy-3-cephem-4-carboxylic acids and esters and to monocyclic .beta.-lactam antibiotics.
Process for 3-halo-1-carba(dethia)-3-cephem antibiotics
申请人:President & Fellows of Harvard College
公开号:US04778884A1
公开(公告)日:1988-10-18
7.beta.-Acylamino-3-trifluoromethylsulfonyloxy-1-carba-3-cephem-4-carboxyli c acid antibiotic compounds, esters and salts thereof, and the corresponding 7-amino and protected 7-amino 1-carbacephalosporins are provided. The 3-trifluoromethylsulfonyloxy-substituted 1-carbacephalosporins also are useful in a process for preparing 3-halo-1-carbacephalosporins which comprises reacting a 3-triflate ester with a lithium halide in an aprotic polar solvent.
3-trifuoromethylsulfonyloxy-substituted 1-carbacephalosporins as
申请人:President and Fellows of Harvard College
公开号:US04820816A1
公开(公告)日:1989-04-11
7.beta.-Acylamino-3-trifluoromethylsulfonyloxy-1-carba-3-cephem-4-carboxyli c acid antibiotic compounds, esters and salts thereof, and the corresponding 7-amino and protected 7-amino 1-carbacephalosporins are provided. The 3-trifluoromethylsulfonyloxy-substituted 1-carbacephalosporins also are useful in a process for preparing 3-halo-1-carbacephalosporins which comprises reacting a 3-triflate ester with a lithium halide in an aprotic polar solvent.
Monohydrate and DMF solvates of a new carbacephem antibiotic
申请人:Eli Lilly and Company
公开号:US05091525A1
公开(公告)日:1992-02-25
The crystalline monohydrate, mono (N,N'-dimethylformamide) and bis(N,N'-dimethylformamide) solvates of 7.beta.-[2'-(R)-2'-(p-hydroxyphenyl-2'-amino-acetamido]-3-chloro-3-(1-carb adethiacephem)-4-carboxylic acid ("LY213735") are novel compounds with superior physical characteristics. Also described are pharmaceutical formulations of crystalline LY213735 monohydrate.