The better reaction conditions for the way are as follows: The ratio of 2,2"-bipyridyls to ethylene dibromide(molar ratio)is 1:1.2;
该工艺较优的反应件:2,2’-联啶与1,2-二溴乙烷的投料比(摩尔比)为1:1.2,反应温度211℃,反应时间2小时。
The better reaction conditions for the way are as follows: The ratio of 2,2"-bipyridyls to ethylene dibromide(molar ratio)is 1:1.2;
该工艺较优的反应件:2,2’-联啶与1,2-二溴乙烷的投料比(摩尔比)为1:1.2,反应温度211℃,反应时间2小时。
2) using pyridine as raw material and pyridine N-oxide et al as medium products ;3) 4-pyridyl-pyridinium dichloride (dibromide) as medium products.
以啶为原料,经氧化、硝化、铁-酸还原或催化加氢4-基啶及其他4-基啶的路线;
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