51263-39-9

Downstream Products

• 77873-90-6 (Z) ethyl 2-phenylthiobut-2-enoate 
• 882-33-7 diphenyldisulfane 
• 105230-77-1 2-Acetyl-3-phenyl-1-vinyl-cyclopropanecarboxylic acid ethyl ester 
• 105230-78-2 (Z)-2-Bromo-7-oxo-5-phenyl-oct-2-enoic acid ethyl ester 
• 105230-73-7 2,2-Dimethyl-4-oxo-6-vinyl-bicyclo[3.1.0]hexane-6-carboxylic acid ethyl ester 
• 56913-22-5 (Z)-2-phenoxy-2-butenoate 

Relevant academic research and scientific papers

Preparation of alkylesters of 0,0-dialkyl-4-phosphono-2-methyl-2-butenoic acid and alkyl esters of 4-halo-2-methyl-2-butenoic acid containing a high percentage of E isomers

A process for the preparation of alkyl esters of 0,0-dialkyl-4-phosphono-2-methyl-2-butenoic acid containing a high percentage of E isomers, wherein the corresponding alkyl esters of 2-hydroxy-2-methyl-3-butenoic acid are caused to react with PBr3 or PCl3 at temperatures ranging from 0° to 80° C. in the absence of pyridine and, if desired, the resulting mixture comprising predominantly alkyl esters of 4-halo-2-methyl-2-butenoic acid is caused to react with trialkyl esters of phosphorous acid at temperatures ranging from 70° to 140° C. The end products are desirable C5 building blocks for polyene syntheses or preceding stages.