Catalytic carbozincation of acetylenic compounds catalyzed by transition metal complexes

Over the last 10 years, conceptually new results have been obtained in the field of unsaturated organozinc reagents; these results need to be analyzed and integrated. This review systematically considers data on the catalytic carbozincation reactions of alkynes, which give alkenyl organozinc compounds, highly reactive intermediates for the synthesis of functionally substituted olefins. The reactions catalyzed by copper, iron, cobalt, nickel, and rhodium complexes are described. A separate part of the review addresses the catalytic reactions initiated by zirconium and titanium compounds. The reaction conditions are indicated; in some cases, putative reaction mechanisms are discussed.The bibliography includes 135 references.