Cn. Ocallaghan et Tbh. Mcmurry, SYNTHETIC REACTIONS OF METHYL XY-CARBONYL-4H-1-BENZOPYRAN-4-YL)-2-CYANOETHANOATE, Journal of chemical research. Synopses, (6), 1995, pp. 214
The title diester characteristically undergoes reactions in which the
cyanoethanoate group is displaced, affording a benzopyran fragment whi
ch undergoes addition (at either the 4- or the 2-position) to reactive
compounds; further rearrangement affords 2H-1-benzopyran derivatives.