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