Quaternary bis-ammonium salt precursors and their uses as prodrugs having an antiparasitic activity
申请人:Vial Henri
公开号:US06972343B1
公开(公告)日:2005-12-06
The invention concerns drug precursors with antimalarial effect, characterised in that it consists in quaternary bis-ammonium salts of general formula (I) wherein A and A′, identical or different, are respectively either a group A1 and A′1 of formula (1) wherein n=2 to 4; R′1 is hydrogen, C1-C5 alkyl, optionally substituted by an aryl, a hydroxy, an alkoxy, wherein the alkyl comprises 1 to 5 C, or aryloxy and W is halogen or a nucleofuge group; or a group A2 which represents formyl-CHO, or acetyl-COCH3. B and B′, identical or different, represent respectively either the group B1 and B′1, if A and A′ respectively represent A1, A′1, B1, B′1 representing a group R1 which has the same definition as R′1 above, but cannot be a hydrogen atom; or respectively the groups B2 and B′2, if A and A′ represent A2, B2 or B′2 being the group R1 as defined above, or a group of formula (2) wherein —Ra is RS— or RCO—, wherein R is a C1-C6 alkyl, substituted if required, a phenyl or benzyl, wherein the phenyl is substituted if required, the latter being optionally substituted; R2 is hydrogen, C1-C5 alkyl, or a —CH2-COO— (C1-C5)alkyl group; and R3 is hydrogen, C1-C5 alkyl or alkenyl, substituted if required, a phosphate, an alkoxy wherein the alkyl is a C1-C3 alkyl, or aryloxy; or an alkyl (or arylcarbonyloxy; or R2 and R3 form together a cycle with 5 or 6 C; R and R3 can be bound to form a cycle. ± represents: either a single bond when A and A′ represent A1 and A′1: or when A and A′ represent A2, and B2 and B′2 Represent (3) either, when A and A′ are —CHO or —COCH3 and B2 and B′2 are R1, a group of formula (4) or a group of formula (5) wherein (a) represents a bond towards Z and (b) a bond towards the nitrogen atom. Z is a C9-C21 alkyl, if required with insertion of one or several bonds, and/or one or several heteroatoms O and/or S and/or several aromatic cycles, and the pharmaceutically acceptable salts of said compounds. Said precursors and cyclized thiazolium derivatives are useful as antiparasitic medicines in particular antimalarial and antibabesiosis.
本发明涉及具有抗疟疾作用的药物前体,其特征在于它由一般式(I)的季铵双盐组成,其中A和A′分别是公式(1)的A1和A′1组,其中n = 2至4;R′1是氢,C1-C5烷基,可选地取代为芳基,羟基,烷氧基,其中烷基包括1至5个C,或芳氧基和W是卤素或亲核离子基;或者A2代表甲酰基-CHO或乙酰基-COCH3。B和B′分别表示组B1和B′1,如果A和A′分别表示A1,A′1,B1,B′1表示具有与上述R′1相同定义的R1组,但不能是氢原子;或者分别是B2和B′2组,如果A和A′表示A2,则B2或B′2是如上所定义的R1组,或者是公式(2)的组,其中-Ra是RS-或RCO-,其中R是C1-C6烷基,必要时被取代,苯基或苄基,其中苯基必要时被取代,后者是可选的取代;R2是氢,C1-C5烷基或-CH2-COO-(C1-C5)烷基;和R3是氢,C1-C5烷基或烯基,必要时被取代,磷酸酯,其中烷基是C1-C3烷基,或烷氧基,其中烷基是C1-C3烷基,或芳氧基;或烷基(或芳基羰氧基;或R2和R3共同形成一个带有5或6个C的环;R和R3可以结合形成一个环。±表示:当A和A′表示A1和A′1时,表示单键;或当A和A′表示A2时,B2和B′2表示(3)或者当A和A′为—CHO或—COCH3且B2和B′2为R1时,表示公式(4)的组或公式(5)的组,其中(a)表示朝向Z的键,(b)表示朝向氮原子的键。Z是C9-C21烷基,必要时插入一个或多个键和/或一个或多个杂原子O和/或S和/或数个芳香环,并且该化合物的药物学可接受的盐。该前体和环化噻唑盐衍生物在特别是抗疟疾和抗巴贝虫病的抗寄生虫药物中有用。