DIRECT ACCESS TO UNSYMMETRICAL TIN HYDRIDES THROUGH (HYDRIDODIORGANOSTANNIO)LITHIUMS

Metalation of diorganostannanes R(2)(1)SnH(2) by lithium diisopropylam ide afforded the corresponding (hydridodiorganostannio)lithiums, R(2)( 1)SnHLi, which were stable at low temperature. Further reaction with a lkyl halides led to functional unsymmetrically substituted alkyldiorga nostannanes, R(2)(1)R(2)SnH. Tin hydrides with an omega-unsaturated su bstituent were stable at room temperature. With a 4-pentyl chain, they underwent a specific cyclization process, giving a stannacyclohexane under radical reaction conditions. A tin hydride with a tin-silicon bo nd could also be prepared.