个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职:无
其他任职:精细化工国家重点实验室副主任、大连理工大学-瑞典皇家工学院分子器件联合研究中心主任
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:化工学院
学科:应用化学. 精细化工
办公地点:大连理工大学西部校区化工实验楼E-223
联系方式:0411-84986493
电子邮箱:sunlc@dlut.edu.cn
Asymmetric epoxidation of styrene and chromenes catalysed by dimeric chiral (pyrrolidine salen)Mn(III) complexes
点击次数:
论文类型:期刊论文
发表时间:2006-11-23
发表刊物:APPLIED CATALYSIS A-GENERAL
收录刊物:SCIE、EI、Scopus
卷号:315
页面范围:120-127
ISSN号:0926-860X
关键字:asymmetric epoxidation; chromene; dimeric manganese complex; salen ligand; styrene
摘要:Two dimeric chiral (pyrrolidine salen)Mn(III) complexes 3 and 4 were prepared, in which the two (pyrrolidine salen)Mn(III) units are linked either by a p-xylylene or by ap-phthalyl bridge. High yields were attained for asymmetric epoxidation of styrene and substituted chromenes at 0.5-4.0 mol% catalyst loading of 3 and 4 using NaClO/PPNO and m-CPBA/NMO as oxidant systems, with 37-39% ee for styrene and 86-95% ee for substituted chromenes. Dimeric complexes 3 and 4 displayed higher activities than their parent monomeric complexes 1 and 2 of double equiv for epoxidation of substituted chromenes. Complex 3 bearing two tertiary amine units displayed considerably higher activity than analogous dimeric complex 4 containing two carboxamide units in the aforementioned reaction. The effect of excess CH3I on the epoxidation of 6-nitro-2,2-dimethylchromene catalysed by 3 in the aqueous/organic biphasic medium was explored. The recovery and recycling possibilities of the dimeric complexes 3 and 4 were studied. (c) 2006 Elsevier B.V. All rights reserved.
上一条:Synthesis and photophysical and electrochemical study of tyrosine covalently linked to high-valent copper(III) and manganese(IV) complexes
下一条:An approach to water-soluble hydrogenase active site models: Synthesis and electrochemistry of diiron dithiolate complexes with 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane ligand(s)