Enantioselective Synthesis of AG-041R by using N-Heteroarenesulfonyl Cinchona Alkaloid Amides as Organocatalysts

被引:196
作者
Hara, Noriyuki [1 ]
Nakamura, Shuichi [1 ]
Sano, Masahide [1 ]
Tamura, Ryota [1 ]
Funahashi, Yasuhiro [1 ]
Shibata, Norio [1 ]
机构
[1] Nagoya Inst Technol, Dept Frontier Mat, Grad Sch Engn, Showa Ku, Nagoya, Aichi 4668555, Japan
基金
日本科学技术振兴机构;
关键词
enantioselectivity; ketimines; organocatalysis; reaction mechanisms; ASYMMETRIC MANNICH REACTION; PICTET-SPENGLER REACTIONS; QUATERNARY CARBON CENTER; ACID HALF-THIOESTERS; ALPHA-AMINATION; DECARBOXYLATIVE ADDITION; POLYKETIDE SYNTHASES; RECEPTOR ANTAGONISTS; MICHAEL-ADDITION; KETIMINES;
D O I
10.1002/chem.201200367
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The organocatalytic enantioselective decarboxylative addition of malonic acid half thioesters to ketimines derived from isatins by using N-heteroarenesulfonyl cinchona alkaloid amides afforded products with high enantioselectivity. The products could be converted into optically active AG-041R. X-ray crystallographic analysis revealed that the hydrogen bonding between the sulfonimide proton and the 8-quinolyl nitrogen atom plays an important role in exerting the enantioselectivity of the reaction.
引用
收藏
页码:9276 / 9280
页数:5
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