SEARCH Articles Figures Tables 1.5- Dimethylpyrazole 1,3 -Dimethylpyrazoles 3 : 5-Dimethylpyrazole 4-Ethynyl-1.3-dimethylpyrazole 4-Ethynyl-l,3-dimethylpyrazole Bromination reaction Bromination with bromine Bromine reactions Ethynylation Ethynyls L- bromine Reaction with bromine Reactions ethynylation With bromine