摘要:
A process of producing N -acyl amino acid based surfactants of Formula (I), wherein, R is selected from C6 to C22 alkyl group, R 1 is selected from H, C1 to C4 alkyl, R 2 is selected from all groups on a carbon of natural amino acids, R 3 is selected from COOX, CH 2 -SO 3 X, X is selected from Li + , Na + or K + ; said process comprising steps of A) preparing fatty acid chlorides by halogenating fatty acids with either phosgene or thionyl chloride in the presence of catalytic amount of same or other N -acyl amino acid surfactant of Formula (I) or anhydrides of same surfactant, Formula (II), wherein, R = C6 to C22 alkyl group, R 1 = H, C1 to C4 alkyl, R 2 = all groups on α carbon of natural amino acids, n = 0 to 4, X = C, SO and B) reacting fatty acid chloride of step (A) with an amino acid in the presence of a base under typical aqueous Schotten Baumann conditions such that said process does not employ a step of purification.
摘要:
A process of producing N-acyl amino acid based surfactants of Formula I, wherein, R is selected from C6 to C22 alkyl group, R1 is selected from H, C1 to C4 alkyl, R2 is selected from all groups on α carbon of natural amino acids, R3 is selected from COOX, CH2—SO3X, X is selected from Li+, Na+ or K+. The process comprising steps of: A) preparing fatty acid chlorides by halogenating fatty acids with either phosgene or thionyl chloride in the presence of catalytic amount of same or other N-acyl amino acid surfactant of Formula I or anhydrides of same surfactant; and B) reacting fatty acid chloride of step (A) with an amino acid in the presence of a base.