Synthesis of isatins with a chiral substituent at the nitrogen atom
摘要:
(R)-Ethyl 2-(isatin-1-yl)propanoates 8a-c were prepared from the corresponding (R)-arylalanines by Sandmeyer's method in high yield and good enantioselectivity (up to 99%). The key step of the process is the Mitsunobu reaction. (C) 2009 Elsevier Ltd. All rights reserved.
Synthesis of isatins with a chiral substituent at the nitrogen atom
摘要:
(R)-Ethyl 2-(isatin-1-yl)propanoates 8a-c were prepared from the corresponding (R)-arylalanines by Sandmeyer's method in high yield and good enantioselectivity (up to 99%). The key step of the process is the Mitsunobu reaction. (C) 2009 Elsevier Ltd. All rights reserved.
EfficientenantioselectiveNHinsertionreactions of secondary and primary anilines were catalyzed by palladium(0) in combination with chiral guanidine derivatives. A broad range of substituted anilines were tolerated, and the corresponding products were obtained in high yield (up to 99 %) with good enantioselectivity (up to 94 % ee) under mild reaction conditions. The NHinsertion mechanism was
Enantioselective insertion of carbenoids into N–H bonds catalyzed by chiral bicyclobisoxazoline copper(I) complexes
作者:Paul Le Maux、Gérard Simonneaux
DOI:10.1016/j.tet.2015.10.009
日期:2015.12
Chiral copper(I)-bicyclobisoxazoline complexes were found to catalyze the insertion of α-diazocarbonyl compounds into N–H bonds of aniline derivatives. The insertion reactions proceeded with high yields (78–99%) and enantioselectivities of up to 81% for the different α-diazopropionates. A predominant effect of the nature and the position of the substituents on the enantiocontrol of the reaction was
Synthesis of isatins with a chiral substituent at the nitrogen atom
作者:Alexander V. Kurkin、Anna A. Bernovskaya、Marina A. Yurovskaya
DOI:10.1016/j.tetasy.2009.05.015
日期:2009.7
(R)-Ethyl 2-(isatin-1-yl)propanoates 8a-c were prepared from the corresponding (R)-arylalanines by Sandmeyer's method in high yield and good enantioselectivity (up to 99%). The key step of the process is the Mitsunobu reaction. (C) 2009 Elsevier Ltd. All rights reserved.