Method for preparing 1-halogenated alkyne under catalysis of heterogeneous Ag catalyst at room temperature
A catalytic preparation and catalyst technology, applied in the field of chemistry, can solve the problems of complex reaction process, low product selectivity, catalyst cannot be recycled and reused, etc., and achieve the effect of good tolerance
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[0024]Example 1
[0025]Compound N-chlorobutyimide (0.45 mmol), potassium acetate (0.3 mmol), 20 mg Ag @ C-2 (silver content was 12.1% by weight) catalyst, acetonitrile (3 mL) and phenylthynacetylene (0.3 Mmol) Added to 10 mL of brown vials and reacted at 25 ° C for 6 hours. The reaction product was confirmed by nuclear magnetic analysis to be 1-halogenated alkyne. With naphthalene as internal standard, the yield of 1-chloroynate hydrine was 93% by the quantitative analysis of gas chromatography.
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[0026]Example 2
[0027]Unlike Example 1, the difference is: 39 mg Ag @ C-1 (silver content is 6.2 wt%) catalyst instead of AG @ C-2 in Example 1, the detection result is: the present embodiment obtains 1 - The yield of chloroynchloride is 91%.
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[0028]Example 3
[0029]The same is substantially the same as in Example 1, which is: an AG @ C-2 in Example 1 using 16 mg Ag @ C-1 (silver content of 15.5 wt%), and the detection result is: the present embodiment obtains 1 - The yield of chlorine alkyne is 84%.
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