Journal of Organic Chemistry p. 556 - 559 (1993)
Update date:2022-08-04
Topics:
Zhang, Juan
Hertzler, Russell L.
Holt, Elizabeth M.
Vickstrom, Thayne
Eisenbraun, Edmund J.
Polyphosphoric acid (PPA) catalyzed cycliacylation of 3-(2-methoxy- and 2,4-dimethoxyphenyl)propionic acids (1a,b) results in dimeric products: 46 and 49percent yields of 5,14-dimethoxy- and 5,7,14,16-tetramethoxy<3.3>metacyclophane-1,10-diones (5a,b) and
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