2) using pyridine as raw material and pyridine N-oxide et al as medium products ;3) 4-pyridyl-pyridinium dichloride (dibromide) as medium products.
吡啶为原料,经氧化、硝化、铁-酸还原或催化加4-氨基吡啶及其他4-氨基吡啶的路线;
2) using pyridine as raw material and pyridine N-oxide et al as medium products ;3) 4-pyridyl-pyridinium dichloride (dibromide) as medium products.
吡啶为原料,经氧化、硝化、铁-酸还原或催化加4-氨基吡啶及其他4-氨基吡啶的路线;
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