Synthesis and in Vitro Activity towards Mycobacterium Tuberculosis of L-serinyl Ester and Amino Derivatives of Pyrazinoic Acid
作者:Alessandra C. Pinheiro、Carlos R. Kaiser、Maria C.S. Lourenço、Marcus V.N. de Souza、Solange M.S.V. Wardell、James L. Wardell
DOI:10.3184/030823407x200001
日期:2007.3
methyl (R)-(+)-2-benzyloxycarbonylamino-3-chloropropionoate (6), were isolated from reaction of 2 with 3, in the presence of DMF remaining from the preparation of 3, from pyrazinecarboxylic acid. The coupling of pyrazinecarboxylic acid with 1, in the presence of DCC was prevented by the formation of the unreactive adduct between DCC and pyrazinoic acid. The compounds were tested against M. tuberculosis:
已经研究了 L-丝氨酸甲酯盐酸盐 (1) 或 cbz 衍生物、(S)-(+)-2-(苄氧羰基氨基)-3-羟基丙酸甲酯 (2) 和吡嗪酰氯 (3) 之间的反应. (S)-(+)-2-benzyloxycarbonylamino-3-[(pyrazinecarbonyl)oxy]propionate (4),methyl (S)-(+)-3-hydroxy-2-[(pyrazine-2-carbonyl)amino ]丙酸酯(7),得到2-[(吡嗪羰基)氨基]丙烯酸甲酯(8)。从 2 与 3-氯丙酸甲酯的反应中分离出另外的产物,即 (S)-(+)-2-苄氧基羰基氨基-3-甲酰氧基丙酸甲酯 (5) 和 (R)-(+)-2-苄氧基羰基氨基-3-氯丙酸甲酯 (6) 3,在DMF的存在下,由吡嗪羧酸制备3。吡嗪羧酸与1的偶联,在 DCC 存在下,DCC 和吡嗪酸之间形成非反应性加合物,从而阻止了这种反