Synthesis of Ester-Substituted Indolizines from 2-Propargyloxypyridines and 1,3-Dicarbonyls

J Org Chem. 2022 Aug 5;87(15):10241-10249. doi: 10.1021/acs.joc.2c01219. Epub 2022 Jul 18.

Abstract

Two new complementary Au(I)-catalyzed methods for the preparation of ester-substituted indolizines from easily accessible 2-propargyloxypyridines and either acetoacetates or dimethyl malonate are reported. These reactions tolerate a wide range of functionality, allowing for diversification at three distinct positions of the product (R, R1, R2). For electron-poor substrates, the highest yields are observed upon reaction with acetoacetates, while neutral and electron-rich substrates give higher yields upon treatment with dimethyl malonate.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Acetoacetates
  • Catalysis
  • Cyclization
  • Esters
  • Indolizines*

Substances

  • Acetoacetates
  • Esters
  • Indolizines