A process for easily and inexpensively producing an imidazo[1,2-b]pyridazin-3-ylsulfonamide derivative which has a substituent bonded to the 6-position carbon atom and is represented by the formula (II):
(wherein R represents lower alkyl, lower cycloalkyl optionally substituted by lower alkyl, lower alkenyl, or lower alkynyl), the process comprising reacting an imidazo[1,2-b]pyridazine compound represented by the formula (I):
(wherein X represents halogeno or lower alkyl optionally substituted by halogeno; Y represents hydrogen or SO
2
N═CH—NR
1
R
2
; and Z represents halogeno or OSO
2
R
3
) with an organometallic compound in the presence of a transition metal catalyst. The derivative is useful as an intermediate for herbicides.
一种用于简便、低成本地生产具有取代基与6-位碳原子键合的
咪唑[1,2-b]
吡嗪-3-基磺酰胺衍
生物的方法,其
化学式表示为(II):(其中R代表低烷基、低环烷基(可选地被低烷基取代)、低烯基或低炔基),该方法包括在过渡
金属催化剂的存在下,将
咪唑[1,2-b]
吡嗪化合物与有机
金属化合物反应,所述
咪唑[1,2-b]
吡嗪化合物的
化学式表示为(I):(其中X代表卤素或低烷基(可选地被卤素取代);Y代表氢或SO2N═CH—NR1R2;Z代表卤素或OSO2R3)。该衍
生物可用作
除草剂的中间体。