Publication Details (including relevant citation information):
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999) (1991), (1), 89-95
Prolonged reaction of 2,3,6-(MeO)3C2H2Me with an excess of premixed (E)-MeCH:CMeCO2H and (CF3CO)2O in air affords 5,6,8-trimethoxy-3,4,7-trimethylisocoumarin (I) in 66% yield as the sole product isolated, the structure of which was confirmed by x-ray crystallog. Shorter reaction times afford products which enable the identification of the reaction mechanism.
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