作者:William R. Ashcroft、Michael G. Beal、John A. Joule
DOI:10.1039/p19810003012
日期:——
Routes for the preparation of the four isomeric pyridineanalogues of phthalide are described starting from the readily available pyridine 2,3- and 3,4-diacids, or derivatives, and making use of the differential reactivity of substituents at pyridine 2-versus 3- and 3-versus 4-positions.