ELECTROCHEMICAL CARBONYLATION OF 2,2-DIBROMO-1-CARBOMETHOXY-1-METHYLCYCLOPROPANE

Direct and indirect electrochemical reductive carbonylation of 2,2-dib romo-1-carbomethoxy-1-methylcyclopropane involving Ni-II ions and CO w as studied in an MeCN-benzene (3:1) mixture in the presence of n-PrOH and Et(2)NH. 2-Bromo-1-carbmethoxy-1-methylcyclopropane with cis-confi guration of substituents is formed upon direct carbonylation in the ca se of n-propanol, while ester or amide of 1-carbomethoxy-1-methylcyclo propanecartboxylic acid are obtained in the other cases. in the presen ce of amine, the direct electrochemical carbonylation occur; under mil der conditions and results in a different ratio of stereoisomeric prod ucts.