n-butyllithium in diethyl ether; hexane; toluene N2 atmosphere, addn. of n-BuLi in hexane to BrC6H4CH2SEt in ether (-78°C), warming to room temp., addn. of B(OMe)3 in ether (-78°C), warming to room temp., addn. of aq. H2SO4, evapn. of ether phase, addn. of (HOC(CH3)2)2 in toluene (2 h); fractional distn.; elem. anal.;

1,8-diazabicyclo[5.4.0]undec-7-ene in benzene Ambient temperature;

diethyl ether

methanesulfonic acid in tetrahydrofuran; diethyl ether; hexane hexane soln. of BuLi added to an ether soln. of bromide under N2 at -30°C, at 0°C THF soln. of 9-BBN added during 1 min, immediately MsOH added at 0°C, mixture was stirred for 1 h at room temp.; filtered, filtrate evapd., residue chromd. on SiO2, ethylthiomethyl B-deriv. purified by HLPC (hexane) and recrystd. from hexane-ether (elem. anal.), 1-ethylthiopentyl B-deriv. recrystd. from hexane (elem. anal.);