T=140°C;

lithium aluminium tetrahydride in tetrahydrofuran 10 h; Heating; Yield given;

n-butyllithium in N,N,N',N',N'',N''-hexamethylphosphoric triamide; diethyl ether under N2, dropwise addn. of soln. of n-C4H9Li to soln. of amine, -20°C, stirring, 2 h; pouring reaction mixt. into chilled H2O, extg. with Et2O; products identified by GC;

(i) nBuLi, benzene, hexane, (ii) /BRN= 1209232/; Multistep reaction;

in diethyl ether 3 h; Ambient temperature;

in N,N,N',N',N'',N''-hexamethylphosphoric triamide; diethyl ether under N2, dropwise addn. of soln. of LDA to soln. of amine, -20°C, stirring, 2 h; pouring reaction mixt. into chilled H2O, extg. with Et2O, washing with 5percent HCl, H2O, satd. aq. NaCl, drying (MgSO4), concg., distn. in vac.; products identified by GC;

CH3I in not given

cesium fluoride 1.) THF, 2h, 50 deg C, 2.) 10 deg C, 0.5h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;