B. Jovanovic et al., Kinetics and mechanism of the reaction of substituted 4-pyrimidine carboxylic acids with diazodiphenylmethane in dimethylformamide, J CHEM R-S, (11), 2000, pp. 506-507
Correlation of the data for the reaction of 11 substituted 4-pyrimidine car
boxylic acids with diazodiphenylmethane (DDM) in dimethylformamide (DMF) wi
th calculated atomic charges on the carboxylic group showed that the reacti
on in this solvent may proceed via a concerted transition state.