Organometallic compounds. LXXII. Reactions of racemic tetraorganotin compounds with butyllithium and with lithium aluminum hydride

Racemic methylneophylptrityltin (I) reacts with an excess of butyllithium to give dibutylmethylneophyltin (II) in high yield, whereas bifluorenyl-9-ylmethylneophenyltin is converted with an excess butyllithium into butylmethylneophylphenyltin (III) together with some (II). This shows that the phenyl is cleaved off as easily as the trityl group but less than the bifluororenylyl group. Methylphenyl(phenylethynyl)(2-phenylpropyl)tin and phenylethynyltrimethyltin react with LiAlH4; the phenylethynyl-tin bond is cleaved but the formed phenylacetylene and organotin hydride react together to give the expected adduct. Bifluorenyl-9-ylmethylneophylphenyltin is converted with LiAlH4, into 1,2-dimethyl-1,2-dineophyl-1,2-diphenylditin. © 1981.SCOPUS: ar.j