The synthesis of quinoxaline-2-carboxaldehyde from o-phenylenediamine and fructose was too expensive because of its low yield.
喹喔啉-2-甲醛的合成按前人的文献，操作麻烦、产率低、成本太高。
The synthesis ofm—Cresol from o—toluic acid by air oxidation was studied in a 1 liter reactor under vigorous stirring conditions in order to eliminate film resistances.
在容积1升的反应釜中，在剧烈搅拌以消除膜阻的条件下研究了邻甲基苯甲酸空气催化氧化制间甲酚的反应。
In the synthesis of N-(o-tolyl)-thiourea from o-toluidine, some effective measures were taken so that the quality of the product was improved and the reaction conditions were optimized.
从邻甲苯胺合成N-邻甲苯基硫脲，对如何提高产物质量，采取了一些有效的措施，获得了最优工艺条件。
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