One-Pot Synthesis of Simple Alkaloids: 2,3-Polymethylene-4(3<i>H</i>)-quinazolinones, Luotonin A, Tryptanthrin, and Rutaecarpine

Abstract

One-pot synthesis of various 2,3-polymethylene-4(3H)-quinazolinones from anthranilic acid, corresponding lactam and SOCl(2) is described, which can be applicable to the synthesis of simple 4(3H)-quinazolinone-derived alkaloids, such as luotonin A, tryptanthrin, and rutaecarpine.