基本解釋n.亞甲基化作用同根派生 methylenation相關(guān)詞英漢例句Safrole is synthesized from catechol through methylenation, selective bromination and Wurtz - Fittig reaction Respectively in yield 85.1%, 74.1%, 72.8% and in total yield 45.9%. 本文研究以鄰苯二酚為起始原料;經(jīng)亞甲基化、選擇性溴化、武茲-菲提格反應(yīng)三步合成黃樟油素;其三步收率分別為85.;1%25;74At the end of reaction, besides methylenation reaction, there still exists a decomposition reaction of the ether linkage, and a little amount of ether linkage still occurs after the end of reaction. 在樹脂的縮聚階段除了有亞甲基化的反應(yīng)外,還存在著醚鍵的分解反應(yīng),少量的醚健在反應(yīng)結(jié)束后仍然存在。Keywords Light stabilizer;UV absorber;Methylenation;Synthesis; 光穩(wěn)定劑;紫外吸收劑;亞甲基化;合成;Study on the Carbonyl Methylenation of cis-Acetylcyclohexanecarboxylic Acid Cis-4-乙?;h(huán)己基甲酸的羰基亞甲基化反應(yīng)研究eyedrops of methylen blue 美藍(lán)滴眼劑, 亞甲藍(lán)滴眼劑methylenation更多例句