Intramolecular Diels–Alder reaction of the diene unit of furan in 2.0 M CaCl2
Abstract
The intramolecular Diels–Alder reaction of substituted 6-(2-furyl)hex-1-en-3-ones (1)–(6) in 2.0 M calcium chloride provides 11-oxatricyclo[6.2.1.01,6]undec-9-en-5-ones (7)–(12) in moderate to good yield.