期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 34, 页码 10108-10112出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201605438
关键词
amino acids; cycloaddition; diazo compounds; enantioselectivity; rhodium
资金
- National Science Foundation [CHE-1533833]
Chiral cyclopentyl beta-amino esters are formed catalytically by [3+2] cycloaddition reactions of enecarbamates with electrophilic metalloenolcarbenes in high yield with up to 98% ee and excellent diastereocontrol. Use of beta-silyl-substituted enoldiazoacetates with a chiral dirhodium catalyst and trans-beta-arylvinylcarbamates are optimal for this transformation, which occurs with hydrogen-bond association between the vinylcarbamate and the intermediate metalloenol-carbene. Reductive conversion of the protected amino esters forms highly functionalized cyclopentyl beta-amino acids and 3-aminocyclopentanones.
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