in acetonitrile the mixt. of reagents in acetonitrile was stirred at room temp.;; filtered, evapd., ppt. was washed with hexane, recrystd. from acetonitrile at 0°C;;

in acetonitrile The mixt. of reagents in acetonitrile was stirred at room temp. for 0.5h;; filtered, evapd. to dryness, crystd. from CH3CN; elem. anal.;;