Experimental test of the [3+2]- and [2+2]-cycloaddition pathways for the bis-cinchona alkaloid-OsO4 catalyzed dihydroxylation of olefins by means of 12C/13C kinetic isotope effects

Article abstract of DOI:10.1016/0040-4039(96)01005-2

The ¹²C/¹³C kinetic isotope effects for the bis-cinchona-OsO₄ catalyzed dihydroxylation of 4-nitrostyrene, 4-methoxystyrene and allyl 4- methoxybenzoate have been measured at the olefinic carbons by the method of Singleton