Journal of Organic Chemistry p. 3382 - 3386 (1983)
Update date:2022-07-29
Topics:
Hassner, Alfred
Dillon, John L.
Dichlorocyclobutenones previously obtained only with difficulty were prepared by the cycloaddition of dichloroketene with alkynes in the presence of phosphorus oxychloride in fair to good yields.The regiochemistry of addition can be rationalized on the ba
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