Enantioselective rhodium-catalyzed hydrogenation of enol carbamates in the presence of monodentate phosphines

被引：34
作者：
Enthaler, Stephan
Erre, Giulia
Junge, Kathrin
Michalik, Dirk
Spannenberg, Anke
Marras, Fabrizio
Gladiali, Serafino
Beller, Matthias
机构：
[1] Univ Rostock, Leibniz Inst Katalyse, D-18059 Rostock, Germany
[2] Univ Sassari, Dipartimento Chim, I-07100 Sassari, Italy
来源：
TETRAHEDRON-ASYMMETRY | 2007年 / 18卷 / 11期
关键词：
D O I：
10.1016/j.tetasy.2007.06.001
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The rhodium-catalyzed asymmetric hydrogenation of different acyclic and cyclic enol carbarnates to give optically active carbarnates has been examined in the presence of chiral monodentate ligands based on a 4,5-dihydro-3H-dinaphthophosphepine motif 4. The enantioselectivity is largely dependent upon the reaction conditions, the nature of substituents on the phosphorus ligand and structure of the enol carbamate. By applying the optimized reaction conditions, enantioselectivities of up to 96% ee have been achieved. (c) 2007 Elsevier Ltd. All rights reserved.
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页码：1288 / 1298
页数：11
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