Pyrazine derivatives useful as plant growth regulating agents have the general formula :
and stereoisomers thereof, wherein R¹ is C₁-C₄ alkyl optionally substituted with halogen, or cyclopropyl optionally substituted with C₁-C₄ alkyl; R² is C₁-C₈ alkyl, C₂-C₈ alkenyl, or C₂-C₈ alkynyl each optionally substituted with halogen; C₃-C₆ cycloalkyl, C₃-C₆ cycloalkenyl, C₃-C₆ cycloalkylalkyl, C₃-C₆ cycloalkenylalkyl, phenylalkenyl or phenylalkenyl each optionally substituted on the ring group; R³ is hydrogen or C₁-C₄ alkyl; R⁴ is hydrogen, C₁-C₄ alkyl, halogen, alkylamino, cyano, or alkoxy; n is 0 or 1; and salts, ethers, acylates and metal complexes thereof.
用作
植物生长调节剂的
吡嗪衍
生物通式为......:
及其立体异构体,其中 R¹ 是任选被卤素取代的 C₁-C₄ 烷基,或任选被 C₁-C₄ 烷基取代的环丙基;R² 是各自任选被卤素取代的 C₁-C₈ 烷基、C₂-C₈
烯基或 C₂-C₈ 烷基;C₃-C₆
环烷基、C₃-C₆环
烯基、C₃-C₆
环烷基、C₃-C₆环
烯基、
苯基
烯基或
苯基炔基,各自可选择被环基取代;R³ 是
氢或 C₁-C₄ 烷基;R⁴ 是
氢、C₁-C₄ 烷基、卤素、烷基
氨基、
氰基或烷
氧基;n 是 0 或 1;以及它们的盐、醚、酰基化合物和
金属络合物。