hours at room temperature the aqueous phase was separated washed with ethylic ether brought to ph 3 3 5 by means of hydrogen chloride and extracted with ethylic ether the extracted washed twice with water and dried was evaporated under vacuum the residual oil was fractionally crystallized from n buthyl bromide thus obtaining 3 3 g of product m p 144 u00b0 146 u00b0 c with a yield of 43 9 i r spectrum 3380 3280 3040 2970 2920 1730 1655 1595 1520 1500 1410 1395 1300 1280 1270 1235 1145 1085 1015 955 925 850 835 765 675 a solution of 3 38 10 millimoles of 2 4 4 chlorobenzoyl phenoxy 2 methyl propanoyl chloride in 25 ml of ethylic ether and 10 ml of 1 n naoh aqueous solution were contemporaneously added at cool and under stirring to a solution of 1 32 g 10 millimoles of n aminoacetyl aminoacetic acid in 10 ml of 1 n aqueous solution of sodium hydroxide after stirring for 3 hours at cool and for 8 hours at room temperature the aqueous phase was separated and washed twice with ethylic ether the ph was brought to 3 3 5 the separated orange yellow oil was washed with ethylic ether was dissolved in methanol and the solution was dried after evaporation under vacuum the residual was crystallized from isobuthanol thus obtaining 1 45 g of product m p 102 u00b0 103 u00b0 c with a yield of 33 5 i r spectrum 3460 3390 3050 2970 2920 1725 1650 1590 1520 1500 1490 1405 1390 1380 1310 1300 1280 1270 1235 1145 1085 1010 955 925 850 835 760 a solution of 3 38 g 10 millimoles of 2 4 4 chlorobenzoyl phenoxy 2.