demethylation 从有机化合物分子中脱掉甲基(-CH3)的反应。 在催化氢化的条件下，甲苯和二甲苯都可以脱掉甲基生成苯，甲基萘也可以脱掉甲基生成萘，都是制备苯和萘的工业化的方法。
在铬钼型催化剂上研究了甲苯加氢脱甲基反应动力学。
The kinetics of hydrodealkylation of toluene into benzene on CrMo catalyst was studied.
槲皮素竞争性抑制CYP3A 2右美沙芬N脱甲基反应，非竞争性抑制CYP2E1氯唑沙宗6羟化反应。
QU exhibited competitive inhibition of CYP3A2 dextromethorphan N-demethylation reaction and expressed noncompetitive inhibition of CYP2E1 chlorzoxazone-6-hydroxylation reaction.
采用正丁醇-氢氧化钠反应体系，以十六烷基三甲基溴化铵为相转移催化剂，制得脱乙酰度为92%的壳聚糖。
The chitosan was prepared with 92% deacetylation degree using n-butanol and sodium hydroxide as a reaction medium and cetyltrimethylammonium bromide as a phase transfer catalyst.
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