申请人:ROHM AND HAAS COMPANY
公开号:EP0023358A1
公开(公告)日:1981-02-04
A 1-aryl-1, 4-dihydro-4-oxopyridazine carboxamide of the formula:
is prepared by an improved process which comprises reacting, in a liquid medium, ammonia or an amine of the formula R1NH, with a hydrazone of the formula:
In the above formulae;
R' is hydrogen, (C1-C6)alkyl, (C1-C4)alkoxy, (C1-C4)alkyl, (C3-C8)cycloalkyl, (C3-C8)cycloalkyl (C,-C4)alkyl, halo(C1-C6)alkyl, (C1-C4) alkoxycarbonyl(C1-C4)alkyl, benzyl or benzyl the ring of which is substituted with up to two of the same or different substituents selected from chloro, bromo, methyl, ethyl, methoxy, cyano, nitro and trifluoromethyl;
R1 and R'are hydrogen or (C1-C4)alkyl;
X is selected from halo, trihalomethyl, nitro, (C1-C4)-alkyl, (C -C4)alkoxy, (C1-C4)alkylthio, (C1-C4)alkylsulfinyl, (C -C4)alkylsulfonyl, cyano and carboxy, the X substituents being the same or different when n is 1; and n is 0 or an integer from 1-3
The amides of Formula I find use as plant growth regulators.
式 1-芳基-1,4-二氢-4-氧哒嗪甲酰胺是通过改进的工艺制备的:
通过改进的工艺制备,该工艺包括在液体介质中,使氨或式 R1NH 的胺与式 R1NH 的腙反应:
在上述式子中
R'是氢、(C1-C6)烷基、(C1-C4)烷氧基、(C1-C4)烷基、(C3-C8)环烷基、(C3-C8)环烷基(C,-C4)烷基、卤代(C1-C6)烷基、(C1-C4)烷氧基羰基(C1-C4)烷基、苄基或其环最多被两个相同或不同的取代基取代的苄基,这些取代基选自氯、溴、甲基、乙基、甲氧基、氰基、硝基和三氟甲基;
R1 和 R'为氢或 (C1-C4)烷基;
X 选自卤、三卤甲基、硝基、(C1-C4)-烷基、(C-C4)烷氧基、(C1-C4)烷硫基、(C1-C4)烷基亚磺酰基、(C-C4)烷基磺酰基、氰基和羧基,当 n 为 1 时,X 取代基相同或不同;n 为 0 或 1-3 的整数。
式 I 的酰胺可用作植物生长调节剂。