acetophenone; lithium diisopropyl amide in tetrahydrofuran byproducts: LiCl; C6H5COCH3 treated with lithium diisopropylamide at 0°C in THF, Sn compd. added, reacted for 10 min; THF removed (vac.), C6D6 added, centrifuged, not isolated, detected by NMR;

in chloroform-d1 room temp.; detected by 119Sn NMR;