摘要
用磺酰化的L 缬氨酸、L 苯丙氨酸、L 亮氨酸和L 异亮氨酸的钛螯合物催化N 丙烯酰 1,3 唑烷 2 酮与环戊二烯的对映选择性Diels Alder (D A)反应 ,其ee值为 48.1%~ 78.2 %.将这些磺酰基氨基酸钛螯合物受载于高分子链上 ,用来催化同一D A反应时 ,反应的对映选择性更好 ,其ee值为 82 .8%~ 84.5 %.
The enantioselective Diels-Alder reaction of N-propenoyl-1,3-oxazolidin-2-one with cyclopentadiene was catalyzed by free and polymer-supported complexes of titanium with N-sulfonyl-L-amino acids. The L-amino acids used in this study were valine, phenylalanine, leucine and isoleucine. The ee values of the reactions catalyzed by the free and polymer-supported complexes were 48.1%~78.2% and 82.8%~ 84.5%, respectively.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2002年第9期1694-1699,共6页
Acta Chimica Sinica
基金
湖南省普通高等学校跨世纪学科带头人培养对象和教育部高等学校骨干教师资助计划资助项目