Abstract:
The present invention provides 5-cyano-4,5-dihydro-3,4-dicarboxypyrazoles and a process for preparing such compounds which comprises reacting a dialkyl fumarate with diazoacetonitrile.
Abstract:
This invention provides methods and 2-(azetidin-2-on-1-yl) acetic acid derivatives of Formula I for the antagonism of the vasopressin V1a receptor.
Abstract:
7.beta.-Amino-3-hydroxy-1-carba(1-dethia)-3-cephem-4-carboxylic acid esters are provided via cyclization of cis-3-(substituted amino)-1-(2-substituted 2-oxoethyl)-4-substituted azetidinones. The 7.beta.-amino-3-hydroxy-1-carba (1-dethia)-3-cephem-4-carboxylic acid esters are useful chiral intermediates to .beta.-lactam antibiotics.
Abstract:
7.beta.-Amino-3-hydroxy-1-carba(1-dethia)-3-cephem-4-carboxylic acid esters are provided via cyclization of cis-3-(substituted amino)-1-(2-substituted 2-oxoethyl)-4-substituted azetidinones. The 7.beta.-amino-3-hydroxy-1-carba(1-dethia)-3-cephem-4-carboxylic acid esters are useful chiral intermediates to .beta.-lactam antibiotics.
Abstract:
The present invention provides 5-cyano-4,5-dihydro-3,4-dicarboxypyrazoles and a process for preparing such compounds which comprises reacting a dialkyl fumarate with diazoacetonitrile.
Abstract:
This invention provides substituted 2-(azetidinon-1-yl) acetic acid derivatives of Formula II for the antagonism of the vasopressin V1a receptor.
Abstract:
The invention provides 1,3,4 substituted and bicyclic derivatives of 2-azetidinones and processes therefor. These compounds are valuable intermediates useful in the preparation of 1-carba(dethia)cephalosporin antibiotics.