共 4 条
Kinetic resolution of amines: A highly enantioselective and chemoselective acetylating agent with a unique solvent-induced reversal of stereoselectivity
被引:94
|作者:
Arseniyadis, S
Valleix, A
Wagner, A
Mioskowski, C
机构:
[1] Fac Pharm, CNR, Lab Synth Bioorgan, UMR 7514, F-67400 Illkirch Graffenstaden, France
[2] CEA Saclay, Serv Mol Marquees, F-91191 Gif Sur Yvette, France
关键词:
acylation;
enantioselectivity;
kinetic resolution;
solvent effects;
D O I:
10.1002/anie.200453956
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Solvents lend a hand: Changing the polarity of the reaction solvent from 1,3-dimethyltetrahydropyrimidin-2-one (DMPU) to toluene reverses the stereo-selectivity observed in the acetylation of amines with (1S,2S)-1 (see scheme). Optimizing the reaction conditions led to an unprecedented 90% ee (S) in DMPU at -20°C with a 33% conversion.
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页码:3314 / 3317
页数:4
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