in diethyl ether addn. of Sn-compd. to suspn. of org.compd. in ether with stirring (20°C, 2 h); evapn. (vac.); elem. anal.;

in diethyl ether addn. of Sn-compd. to suspn. of org.compd. in ether with stirring (20°C, 2 h); evapn. (vac.); elem. anal.;

n-butyllithium in diethyl ether; hexane byproducts: LiCl, butane; dropwise addn. of a hexane soln. of BuLi to a soln. of t-C4H9NH2 in diethylether with ice/H2O cooling; refluxing, 2 h; dropwise addn. of a soln. of Me3SnCl in diethyl ether at 0°C; refluxing, 3 h; performed in N2 atm. (air and moisture excluded);; filtration; evapn. of the solvents; distn.;;

in diethyl ether byproducts: LiCl; 2 h reflux under N2; solvent was removed in vac., distn. at 56 °C/8E-3 Torr;

n-butyl lithium in diethyl ether; hexane N2 atmosphere; metallation of amine with BuLi in hexane (-15°C, 30-60 min), refluxing (2 h), addn. of soln. of Sn-compd. in Et2O (-60°C, 40-60 min), refluxing (2 h); centrifugation (15 min, 1300 rpm), washing (hexane), removal of volatiles from solns. (12 Torr), distn.; elem. anal.;