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Paper | Special issue | Vol 54, No. 2, 2001, pp.679-689
Published online, 1st January, 1970
DOI: 10.3987/COM-00-S(I)42
An Efficient Preparation of 2H-Cyclohepta[b]furan-2-ones

Noboru Morita,* Masao Kudo, Ryuji Yokoyama, and Shunji Ito*

*Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan

Abstract

2H-cyclohepta[b]furan-2-one (3) was prepared in high yield from a [2+2] cycloadduct between cycloheptatriene and dichloroketene by Baeyer-Villiger oxidation followed by dehydrochlorination. 3-Chloro- (8) and 6-chloro-2H-cyclohepta[b]furan-2-one (9) were obtained from the [2+2] cycloadduct by adding an epoxidation step to the above synthetic way in moderate yields.