D. Robinson et al., DICHLOROMETHYLENATION OF SUBSTITUTED 1H-ISOINDOLE-1,3-(2H)-DIONES (PHTHALIMIDES), Journal of heterocyclic chemistry, 32(3), 1995, pp. 783-785
A number of substituted 1H-isoindole-1,3-(2H)-dione derivatives (phtha
limides) underwent dichloromethylenation when reacted with a mixture o
f triphenylphosphine and carbon tetrachloride.