Abstract
AbstractThis is a revised Science of Synthesis contribution describing methods for the synthesis of stannylenes. Substitution reactions of stable tin(II) compounds such as SnCl2, chlorostannylenes, and aminostannylenes with organolithiums are useful synthetic methods for preparing stannylenes. Insertion reactions of multiple bonds into Sn–X (X = H, B, C, Sn) bonds of hydrostannylene dimers, borylstannylenes, or distannynes can also afford the corresponding stannylenes. In addition, migration reactions of hydrogen, carbon, and amino substituents in (dihydrostannyl)germylene and tin–metal double-bond compounds are used for the synthesis of metal-substituted stannylenes. Finally, reduction of tetravalent tin compounds, such as dibromostannanes, has also been reported for the synthesis of stannylenes.