present paper, we report l-ascorbic acid (vitamin C) as an efficient and robust catalyst for the straightforward synthesis of various organic compounds, including carboxamide, benzodiazepine and benzoxazepine derivatives. These compounds with potential drug value which exhibit a broad spectrum biological and pharmacological activities were successfully accessed with vitamin C catalytic system under environmentally
A new one-pot, three-component reaction of aromatic aldehydes, 2-aminophenol, and dimedone for the synthesis of tricyclic 1,4-benzoxazepine derivatives in moderate to good yields is described. (C) 2013 Elsevier Ltd. All rights reserved.