Reference

Study of the pKa and the protodeboronation of furanboronic acids

Study of the pKa and the protodeboronation of furanboronic acids. Florentin, D.; Fournie-Zaluski, M. C.; Callanquin, M.; Roques, B. 109-72-8 and 62306-80-3 are also occured in this study. P. (Ec. Polytech., Paris, Fr.). J. Heterocycl. Chem., 13(6), 1265-72 (French) 1976. CODEN: JHTCAD. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The pKa's of the furanboronic acids and their formyl, acetyl, and Me derivs. were detd. in an investigation of the influence of electronic and steric effects on the acidity of the boronic group. Protodeboronation kinetic studies of these different acids in HClO4 suggests a new mechanism for the electrophilic reaction in agreement with isotopic and substituent effects, and the strongly neg. activation entropy. Comparison of the reaction rates between the benzene, thiophene, and furan series permits calcn. of the specific reaction const. .rho. of the protodeboronation. .