Gogte, V. N.; Kelkar, S. V.; Tilak, B. D., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1980, vol. 19, # 12, p. 1011 - 1013
Abstract A simple procedure for the synthesis of 2H-pyran-2-ones 1 is described: selective Wittig olefination of keto aldehydes at the aldehyde group followed by a cyclization in acidic medium.