New optically active organotin compounds for heterogeneous bimetallic catalysis

Chiral tin(IV) derivatives with two or three chiral centers adjacent to the metal (−)-Ment2SnMe2, (−)-Ment2SnPh2, (−)-Ment3 SnCl, (−)-Ment3SnH; (−)-Ment  (1R, 2S, 5R)-1-chloro-5-methyl-2-isopropylcyclohexane, R2Sn[CH(Me)(n-Hex)]2 (R  Bu or Ph) have been prepared either by the coupling of methylmagnesium chloride with tin halides or by the reaction of lithium stannates with optically active (2-octyl)tosylate. The stereospecificity of both...