The present invention provides an improved process for the production of triazoles of the formula (1):
wherein Z is an optionally substituted (C₆-C₁₀)aryl group; R is a hydrogen atom, a (C₁-C₁₂)alkyl group, a (C₃-C₈)cycloalkyl group, a (C₂-C₈)alkenyl group, a (C₅-C₈)cycloalkenyl group, an optionally substituted (C₇ to C₁₄)aralkyl group, a (C₂ to C₄)alkynyloxy group, an optionally substituted (C₆ to C₁₀)aryloxy group or a hydroxy group; Q is an optionally substituted 1-(1,2,4-triazolyl) or 4-(1,2,4-triazolyl); X is hydrogen or CN; m is zero or one; and n is one or two
The triazoles are provided in higher yields than previously obtained. The improved yields are obtained by the incremental or continuous addition of triazole salts to compounds having the formula (2):
and m, n, R, X, and Z are the same as defined above, and Y is halo, tosyl or mesyl.
本发明提供了一种生产式(1)三唑的改进工艺:
其中 Z 是任选取代的(C₆-C₁₀)芳基;R 是氢原子、(C₁-C₁₂)烷基、(C₃-C₈)环烷基、(C₂-C₈)烯基、(C₅-C₈)环烯基、任选取代的(C₇-C₁₄)芳烷基、(C₂-C₄)炔氧基、任选取代的(C₆-C₁₀)芳氧基或羟基;Q 是任选取代的 1-(
1,2,4-三唑基)或 4-(
1,2,4-三唑基);X 是氢或 CN;m 是 0 或 1;n 是 1 或 2。
这些三唑的收率比以前得到的要高。产量的提高是通过在具有式(2)的化合物中逐步或连续加入三唑盐获得的:
m、n、R、X 和 Z 与上式定义相同,Y 为卤代、
甲苯基或甲磺酰基。