In this study, ${alpha}$-chlorosuccinic acid was synthesized through the reaction of maleic anhydride with HCl(g), (UV)250 nm~300 nm wavelength in presence of $CCl_4$. For the second reaction of N-(monochloro)succinic acid contained glucosamine derivatives(I) was accomplished by a modification of the general acylation using excess ${alpha}$-chlorosuccinic anhydride in the presence of 2% acetic acid with methanol condition as a solvent at elevated temperature($70^{circ}C$). We considered organic acid derivatives were useful especially for treatment for the cultivating porphyra.