Journal of the Chemical Society. Perkin transactions I p. 3205 - 3213 (1981)
Update date:2022-08-05
Topics:
Lee, Hiok-Huang
Acylation of 5,7-bisbenzyloxy-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran (10c) with 6,8-dimethoxy-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-5-carboxylic acid (9b) in the presence of trifluoroacetic anhydride gave 5,7-dibenzyloxy-3,4-dihydro-2,2-dimethyl-2H-1
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