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Communication | Regular issue | Vol 32, No. 2, 1991, pp.213-220
Published online, 1st January, 1970
DOI: 10.3987/COM-90-5628
A Convenient, One-Pot Azulene Synthesis from 2H-Cyclohepta[b]furan-2-ones with Vinyl Ether and Its Analogues III. Orthoesters as a reagent

Tetsuo Nozoe,* Hidetsugu Wakabayashi,* Kimio Shindo, Sumio Ishikawa, Chi-Phi Wu, and Paw-Wang Yang*

*Department of Chemistry, Faculty of Science, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan

Abstract

2-Alkoxy and 2,4-dialkoxyazulene derivatives were synthesized in one-pot and in good yields by the reaction of 2H-cyclohepta[b]furan-2-ones with orthoesters on heating either neat or in an aprotic solvent at 160 - 190 °C