Process for producting imidazo[1,2-b]pyridazine derivative

Details Process for producting imidazo[1,2-b]pyridazine derivative Process for producting imidazo[1,2-b]pyridazine derivative

2007-12-11

2007-12-11

Berch, Mark L. (Department: 1624)

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

Reexamination Certificate

active

10522798

ABSTRACT:
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 SO2N═CH—NR1R2; and Z represents halogeno or OSO2R3) with an organometallic compound in the presence of a transition metal catalyst. The derivative is useful as an intermediate for herbicides.

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