hydrogenchloride; silica gel in diethyl ether under Ar, suspn. of educt in ether stirred with 10percent HCl and small amts.of silica gel for 2 h; washed with Na2CO3 soln., dried over Na2SO4, evapd., chromd. (silica, hexane/ether);

hydrogenchloride; silica gel in diethyl ether under Ar, suspn. of educt in ether stirred with 10percent HCl and small amts.of silica gel for 2 h; washed with Na2CO3 soln., dried over Na2SO4, evapd., chromd. (silica, hexane/ether);