in tetrahydrofuran boiling, 22h;;

cyclohexyl-Mg-X in tetrahydrofuran under N2; to a soln. of the Grignard reagent in THF was added a soln. ofPh2SnCl2 at reflux, refluxed overnight; cooled to room temp., addn. of NH4Cl soln., organic layer was filtered, residue was washed with ether, filtrate and washings were combined, evapd., taken up in ether, washed with KF soln. and water, evapd.;

in diethyl ether

1: succinimide / ethanol 2: tetrahydrofuran View Scheme

diethyl ether

2: tetrahydrofuran View Scheme

2: tetrahydrofuran View Scheme

in chloroform

in chloroform

N2; molar ratio =1:1; stirring for 1 h at 0 ° C;;