Solid-state synthesis of heterocyclic hydrazones using microwaves under catalyst-free conditionsPresented, in part, at the 5th Electronic Conference on Synthetic Organic Chemistry, (ECSOC-5), 1–30 September 2001, E0014, http://www.mdpi.org/ecsoc-5.htm

The reactions of neat 5- or 8-oxobenzopyran-2-ones, 1–3, with a variety of aromatic and heteroaromatic hydrazines, 4, are accelerated upon irradiation in a household microwave oven in the absence of any catalyst, solid support or solvent. The approach provides an attractive and environmentally friendly pathway to several synthetically useful heterocyclic hydrazones.