乙酰基吡啶是一种重要的希夫碱前驱体。
Acetyl-pyridine is an important precursor for the synthesis of Schiff-Base ligands.
探讨了如何控制在均相条件下以高脱乙酰度的壳聚糖为主要原料，在乙酸水溶液- 乙醇-吡啶介质中实现壳聚糖N位乙酰化反应的问题；
By high acetylation of chitosan at N position with acetic anhydride in a homogeneous medium known as acetic solution–alcohol-pyridine system, water-soluble chitosan was prepared.
以N-甲基乙酰胺、醋酸乙烯酯为原料，N，N-二甲氨基吡啶（DMAP）为催化剂，合成N-甲基-N-乙烯基乙酰胺。
N-Methyl-N-vinylacetamide was synthesized from N-methylacetamide and vinyl acetate with N, N-dimethylamino pyridine (DMAP) as catalyst.
用酸水解多糖链后经离子交换净化 ，再用醋酐、吡啶加热回流乙酰化。
The glycosides in membrane proteins were extracted by using acid and cleared by using ion exchange column.
本发明涉及一种稳定的、高纯度的7-苯乙酰氨基-3-吡啶甲基-3-头 孢菌素-4-羧酸对甲氧苄酯晶体及其制备方法。
The present invention relates to the stable and high purity 7-phenacetylamino-3-pyridylmethyl -3-cynnematin-4-p-methoxybenzyl carboxylic ester crystal and its preparation process.
本发明涉及一种稳定的、高纯度的7-苯乙酰氨基-3-吡啶甲基-3-头 孢菌素-4-羧酸对甲氧苄酯晶体及其制备方法。
The present invention relates to the stable and high purity 7-phenacetylamino-3-pyridylmethyl -3-cynnematin-4-p-methoxybenzyl carboxylic ester crystal and its preparation process.
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