ChemInform Abstract: Synthesis of 1,2,5‐Azastannaborole Derivatives from Sulfur Diimide Anions and cis‐Stannyl‐boryl‐alkenes. X‐Ray Crystallographic Study of Two 2,5‐Dihydro‐1‐(imino‐λ4‐sulfanylidene)‐1,2,5‐ azastannaboratoles.

Abstract

Synthesis of 1,2,5-Azastannaborole Derivatives from Sulfur Diimide Anions and cis-Stannyl-boryl-alkenes. X-Ray Crystallographic Study of Two 2,5-Dihydro-1-(imino-λ4-sulfanylidene)-1,2,5-azastannaboratoles.-Since the effect of organometallic substituents at a C-C double bond on the reactivity of alkenes is of interest, the reactions of (I) with sulfur diimides are investigated. The compounds (IIIa) and (IIIb), which are characterized by X-ray crystallography, rearrange into the derivatives (IV) with an additional Sn-N coordination. (IVa) eliminates ethylene leading quantitatively to the diaminosulfone derivative (V). The compound (VII), in which a borole and a boratole ring exist, is obtained from (I) and the dianion of (VI). -(WRACKMEYER, B.; FRANK, S. M.; HERBERHOLD, M.; BORRMANN, H.; SIMON, A.; Chem.