Synthesis of carbamoylpyridine and imidazo[1,5-a]pyridin-1,3-diones via ortho-acetalhydantoin intermediates
摘要:
A new method for preparing carbamoylpyridine and imidazo[1,5-a]pyridin-1,3-dione rings from an ortho-acetalmethylideneimidazolidin-2,4-dione is described. (C) 2003 Published by Elsevier Ltd.
We report the first example of the construction of chiral 2,3-benzodiazepine compounds which are of biologic and pharmaceutical relevance by asymmetriccatalysis. Catalyzed by a thiazolium-derived carbene and a palladium-chiral bidentate phosphine complex in sequence, one-pot reaction between 1-(2-(2-nitrovinyl)aryl)allyl esters 1 with azodicarboxylates 2 took place efficiently at ambient temperature