Journal of the Chemical Society. Chemical communications p. 777 - 779 (1988)
Update date:2022-08-05
Topics:
Majumdar, K. C.
De, R. N.
Khan, A. T.
Chattopadhyay, S. K.
Dey, K.
Patra, A.
3-(4-p-Tolyloxybut-2-ynyloxy)<1>benzopyran-2-one (1), when refluxed in chlorobenzene, ethyl benzene, or xylene, gave exclusively 1-(p-tolyloxymethyl)pyrano<2,3-c><1>benzopyran-5(3H)-one (2), whereas through an ionic or radical pathway 2-methyl-1-(p-tolylo
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