申请人:THE UNIVERSITY OF NOTRE DAME DU LAC
公开号:EP0116432A2
公开(公告)日:1984-08-22
N-(Mono- or disubstituted methyl)-2-azetidinones, produced by cyclizing β-hydroxy or ε-halo substituted acid sec-amides in which the amide nitrogen is subsituted with a mono- or di-substituted methyl group having activating substituents, are useful intermediates for the production of antibiotics. The compounds have the formula
in which R is hydrogen, C1-C4 alkoxy, amino, protected-amino, acylamino, diacylamino, C1-C4 alkyl, or C1-C4 alkyl sustituted by hydroxy, C1-C4 alkoxy, halogen, amino, protected-amino, carboxy, or protected carboxy;
R, is hydrogen, hydroxy, C1-C4 alkoxy, halogen, or C1-C4 alkyl;
R2 is hydrogen, phenyl, substituted phenyl, carboxy, C1-C4 alkoxycarbonyl, protected carboxy, sulfydryl, C1-C4 alkylthio, C2-C4 alkanoylthio, halogen, C1-C4 alkoxy, C1-C4 alkyl, or C1-C4 alkyl substituted by hydroxy, C1-C4 alkoxy, halogen, amino, protected amino, carboxy, or protected carboxy;
Y is a substituted methyl group of the formulae
in which R3 or R3' is hydrogen, C1-C4 alkoxycarbonyl, protected carboxy, carboxy, C1-C4 alkylsulfonyl, arylsulfonyl, C1-C4 alkylsulfinyl, arylsulfinyl, C1-C4 alkanoyl, aroyl, C1-C4 alkyl, cyano, vinyl, or ethinyl;
R4 is hydrogen, C1-C4 alkyl, or a carboxy protecting group;
R5 and R5, independently are C1-C4 alkyl, C1-C4 alkoxy- carbonyl, carboxy, protected-carboxy, or phenyl; and,
R6 is hydrogen, C,-C4 alkyl, C,-C4 alkoxy-carbonyl, protected-carboxy, or phenyl; or an addition salt thereof.
N-(一取代或二取代甲基)-2-氮杂环丁酮是生产抗生素的有用中间体,由β-羟基或ε-卤代酸仲酰胺环化生成,其中的酰胺氮被具有活化取代基的一取代或二取代甲基取代。这些化合物的化学式为
其中 R 是氢、C1-C4 烷氧基、氨基、受保护氨基、酰氨基、二酰氨基、C1-C4 烷基或被羟基、C1-C4 烷氧基、卤素、氨基、受保护氨基、羧基或受保护羧基取代的 C1-C4 烷基;
R 是氢、羟基、C1-C4 烷氧基、卤素或 C1-C4 烷基;
R2 是氢、苯基、取代的苯基、羧基、C1-C4 烷氧基羰基、受保护的羧基、硫基、C1-C4 烷硫基、C2-C4 烷酰硫基、卤素、C1-C4 烷氧基、C1-C4 烷基或被羟基、C1-C4 烷氧基、卤素、氨基、受保护的氨基、羧基或受保护的羧基取代的 C1-C4 烷基;
Y 是式中的取代甲基
其中 R3 或 R3'是氢、C1-C4 烷氧基羰基、受保护的羧基、羧基、C1-C4 烷基磺酰基、芳基磺酰基、C1-C4 烷基亚磺酰基、芳基亚磺酰基、C1-C4 烷酰基、芳基、C1-C4 烷基、氰基、乙烯基或乙炔基;
R4 是氢、C1-C4 烷基或羧基保护基团;
R5 和 R5 分别独立为 C1-C4 烷基、C1-C4 烷氧羰基、羧基、保护羧基或苯基;以及
R6 是氢、C,-C4 烷基、C,-C4 烷氧基-羰基、保护-羧基或苯基;或其加成盐。