Total Synthesis of Glipizide and Glibenclamide in Continuous Flow.

Chemistry

Department of Chemistry, Nelson Mandela University, University Way, Port Elizabeth, 6031, South Africa.

Published: November 2021


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Article Abstract

Glipizide and glibenclamide remain some of the widely prescribed antidiabetic sulfonylurea drugs for the treatment of type 2 diabetes mellitus. Herein the authors report on an isocyanate-free synthetic procedure towards the preparation of these on demand drugs at multigram scale using continuous flow technology. The safety concern over the use of isocyanates in most of the existing synthetic routes was dealt with in this present work by using N-carbamates synthesised in situ from activation of amines with chloroformates as safer alternatives. An overall yield of 80-85 % was obtained for the semi-telescoped steps within 10 min total residence time.

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http://dx.doi.org/10.1002/chem.202103196DOI Listing

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