PROCESSES FOR CONVERSION OF TYROSINE TO P-HYDROXYSTYRENE AND P-ACETOXYSTYRENE
申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP1999095A2
公开(公告)日:2008-12-10
US7402713B2
申请人:——
公开号:US7402713B2
公开(公告)日:2008-07-22
[EN] PROCESSES FOR CONVERSION OF TYROSINE TO P-HYDROXYSTYRENE AND P-ACETOXYSTYRENE<br/>[FR] PROCEDES DE CONVERSION DE LA TYROSINE EN P-HYDROXYSTYRENE ET P-ACETOXYSTYRENE
申请人:DU PONT
公开号:WO2007103478A2
公开(公告)日:2007-09-13
[EN] Tyrosine was converted to p-hydroxystyrene in a two-step reaction without purification of individual intermediates. Conditions were determined for bromination of tyrosine in which reactive intermediates were formed. The mixture of these intermediates was used directly in a second step reaction to produce p-hydroxystyrene. The p-hydroxystyrene was further acetylated to produce p-acetoxystyrene in the second step reaction vessel. [FR] La présente invention concerne une tyrosine qui a été convertie en p-hydroxystyrène au cours d'une réaction en deux étapes sans purification des divers intermédiaires. Des conditions ont été déterminées pour la bromination de la tyrosine dans laquelle des intermédiaires réactifs ont été formés. Le mélange de ces intermédiaires a été utilisé directement au cours d'une seconde étape de réaction pour produire du p-hydroxystyrène. Le p-hydroxystyrène a en outre été acétylé en vue de produire du p-acétoxystyrène dans la cuve à réaction de la seconde étape.
Processes for conversion of tyrosine to p-hydroxystyrene and p-acetoxystyrene
申请人:Shuey W. Steven
公开号:US20070213569A1
公开(公告)日:2007-09-13
Tyrosine was converted to p-hydroxystyrene in a two-step reaction without purification of individual intermediates. Conditions were determined for bromination of tyrosine in which reactive intermediates were formed. The mixture of these intermediates was used directly in a second step reaction to produce p-hydroxystyrene. The p-hydroxystyrene was further acetylated to produce p-acetoxystyrene in the second step reaction vessel.