Metalation of diorganostannanes R12SnH2 by lithium diisopropylamide afforded the corresponding (diorganostannyl)lithiums, R12SnHLi. Further reaction with halides led to unsymmetrically substituted alkyl-diorganostannanes, R12R2SnH. In situ stepwise dimetalation of diorganostannanes R12SnH2 gave the expected dialkylation products R12R22Sn with organic halides, aldehydes, and epoxides.
Direct Access to Unsymmetrical Tin Hydrides through (Hydridodiorganostannio)lithiums
temperature. Further reaction with alkyl halides led to functional unsymmetrically substituted alkyldiorganostannanes, R12R2SnH. Tin hydrides with an ω-unsaturated substituent 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 bond could also be prepared.