A metal-free cross-dehydrogenative coupling of N-carbamoyl tetrahydroisoquinoline by sodium persulfate
摘要:
A metal-free cross-dehydrogenative coupling of N-carbamoyl tetrahydroisoquinoline with a variety of C-H nucleophiles mediated by Na2S2O8 is developed. The reaction proceeds smoothly to give the coupled product in up to 83% yields. The nucleophile scope is broad, including simple ketones, aldehydes, and aryl rings. The carbamoyl protecting group can be readily removed under mild condition. The use of Na2S2O8 as the sole reagent for the CDC reaction is attractive based on economical and environmental factors. (C) 2014 Elsevier Ltd. All rights reserved.
A metal-free cross-dehydrogenative coupling of N-carbamoyl tetrahydroisoquinoline with a variety of C-H nucleophiles mediated by Na2S2O8 is developed. The reaction proceeds smoothly to give the coupled product in up to 83% yields. The nucleophile scope is broad, including simple ketones, aldehydes, and aryl rings. The carbamoyl protecting group can be readily removed under mild condition. The use of Na2S2O8 as the sole reagent for the CDC reaction is attractive based on economical and environmental factors. (C) 2014 Elsevier Ltd. All rights reserved.
Brønsted Acid Catalyzed C-H Functionalization of<i>N</i>-Protected Tetrahydroisoquinolines via Intermediate Peroxides
作者:Bertrand Schweitzer-Chaput、Martin Klussmann
DOI:10.1002/ejoc.201201527
日期:2013.2
An organocatalytic oxidative synthesis of N-protected tetrahydroisoquinolines is described by C–Hfunctionalizationviaintermediateperoxides. The peroxides were synthesized from tert-butylhydroperoxide under metal-free thermal conditions and were converted into the final products by Bronsted acidcatalyzed substitution. The nucleophile scope was investigated in detail and proved to be broad; N-deprotection