On January 6, 2016, Lian, Lei; Zheng, Yurong; He, Bin; Peng, Xuegang; Jin, Tao; Cui, Qi published a patent.Safety of 5-Methoxy-1H-pyrazole The title of the patent was Pyrazole ketone compound or salt thereof, preparation method, herbicidal composition and application. And the patent contained the following:
The inventive pyrazole ketone compound has structure shown as general formula I, wherein R1R2N represents (un)substituted 3-8 membered nitrogen-containing heterocyclic group containing 1-3 hetero atoms, or R1 and R2 are independently H, alkyl, heteroalkyl, etc.; R3 is H, alkyl, alkenyl, alkynyl, cycloalkyl or alkyl substituted cycloalkyl; R4 is Me, Et, Pr, iso-Pr, or cyclopropyl; X is H, S(O)nR6, R7, or (substituted) 3-8 membered heterocyclic group containing 1-4 hetero atoms, n is 1, 2 or 3; R6 is (un)substituted alkyl or aryl, R7 is (un)substituted alkyl, aryl, alkanoyl or aroyl. Compounds of the invention were prepared and evluated for their herbicidal activity on various crops (data given). The pyrazole ketone compound has good herbicidal effect, convenient application, low cost, and high com. value. The experimental process involved the reaction of 5-Methoxy-1H-pyrazole(cas: 215610-30-3).Safety of 5-Methoxy-1H-pyrazole
The Article related to pyrazole ketone preparation herbicide, Heterocyclic Compounds (More Than One Hetero Atom): Pyrazoles and other aspects.Safety of 5-Methoxy-1H-pyrazole
Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics