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Issue:
Researches Into Catalytic Asymmetric Epoxidation of Styrene With Metalloporplyins
Author(s):
WANG Yajun
,
LV Zixue
Pages:
57
-
59
Year:
2004
Issue:
1
Journal:
JOURNAL OF HUZHOU TEACHERS COLLEGE
Keyword:
金属卟啉
;
催化剂
;
不对称环氧化
;
对映体过量
;
Abstract:
以3种简单卟啉配合物为催化剂,以手性季铵盐为手性相转移催化剂,以NaClO为氧化剂,研究了三种不同取代基卟啉锰配合物、不同手性相转移催化剂及反应温度对催化苯乙烯不对称环氧化对映选择性的影响.结果表明:在苯乙烯的不对称环氧化反应中,以氯化苄基奎宁为手性相转移催化剂,催化剂四(4-氯苯基)卟啉锰不对称诱导作用优于另外两种,在反应温度为-5℃时,ee值可达到7.5%.
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