申请人:Monsanto Company
公开号:EP0136996A2
公开(公告)日:1985-04-10
A process for the synthesis of L-phenylalanines and analogues thereof from trans-cinnamate, ring substituted trans-cinnamates or various acrylate derivatives and ammonia or an ammonia donor in the presence of L-phenylalanine ammonia-lyase enzyme and a desensitizing agent such as polyhydric alcohols and polyethylene glycol-(400) is disclosed. The process embraces the discovery that compounds such as polyhydric alcohols and polyethylene glycol-(400) desensitize the L-phenyalanine ammonia-lyase enzyme to substantially higher substrate concentrations than practiced heretofore. In addition, polyhydric alcohols and polyethylene glycol-(400) substantially enhance the instantaneous rate of reaction and inhibit inactivation of the L-phenylalanine ammonia lyase enzyme over longer reaction periods.
本发明公开了一种由反式肉桂酸酯、环取代的反式肉桂酸酯或各种丙烯酸酯衍生物和氨或氨供体在L-苯丙氨酸氨化酶和脱敏剂(如多元醇和聚乙二醇-(400))存在下合成L-苯丙氨酸及其类似物的工艺。该工艺发现,多羟基乙醇和聚乙二醇-(400)等化合物可使 L-苯丙氨酸氨解酶脱敏,使其对底物浓度的要求大大高于以往的做法。此外,多元醇和聚乙二醇-(400)还能大大提高反应的瞬时速度,并在较长的反应时间内抑制 L-苯丙氨酸氨解酶的失活。