期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 9, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202114129
关键词
1,2,3-Triazolium Salts; 2,5-Diketopiperazines; Asymmetric Catalysis; Dialkylation; Phase-Transfer Catalysis
资金
- NSFC [21502080, 21772019, 21772076, 21871117, 91956203, 21971095]
- 111 Program of MOE
- MOST [2018ZX09711001-005-002]
- STCSM [19JC1430100]
- High-Performance Computing Center (HPCC) of Shanghai Jiao Tong University
Novel asymmetric mono- and dialkylation reactions of α-substituted 2,5-diketopiperazines catalyzed by new chiral spirocyclic-amide-derived triazolium organocatalysts have been developed, leading to enantioenriched products and providing a new synthetic approach.
Novel asymmetric mono- and dialkylation reactions of a-substituted 2,5-diketopiperazines catalyzed by new chiral spirocyclic-amide-derived triazolium organocatalysts have been developed, resulting in a range of enantioenriched 2,5-diketopiperazine derivatives containing one or two tetrasubstituted carbon stereocenters. The reactions feature high yields (up to 98%), and excellent cis-diastereo- and enantioselectivides (up to >20:1 dr, >99% ee), and they provide a new asymmetric synthetic approach to important pinctionalized 2,5-diketopiperazine skeletons. Furthermore, a possible reaction mechanism was proposed based on both control experiments and extensive DFT calculations.
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