iv 207 g 1 eq in toluene 1450 ml vitride solution 412 g 2 eq 70 in toluene was slowly added at room temperature the reaction was maintained for 15 min at this temperature 50 aqueous sodium hydroxide solution 360 g 3 15 eq was slowly added keeping the mixture at room temperature the mixture was warmed to 50 60 u00b0 c and the aqueous layer was separated and extracted at the same temperature with toluene 924 ml both organic layers were concentrated together until dry oxazolidine ii was obtained 154 5 g 84 as a brownish oil which was distilled to give a highly pure colorless oil 65 g bp2 80 u00b0 c ir film n cm 1 2865 1676 1457 1297 1113 1046 ms el m z 129 m 50 99 m ch20 100 98 m ch3o 90 84 m c2h5o 10 71 m c3h6o 51 56 m 73 37 42 m 87 47 41 m 88 65 production of oxazolidin 2 3 morpholine ii in a one pot reaction starting from diethanolamine potassium tert butoxyde 176 g 1 1 eq was added to 1440 ml of toluene the suspension was heated to 75 u00b0 c and maintained for 30 min until complete dissolution of the white solid at this temperature diethanolamine 150 g 1 eq was added slowly the thick pale yellow suspension was maintained with strong stirring for 30 min and methyl chloroacetate 163 g 1 05 eq was added slowly the solution was maintained at the same temperature for two hours reaction mixture was cooled at 30 u00b0 c and vitride solution 412 g 2 eq 70 in toluene was added slowly at room temperature the reaction.