One of the hydrogen atoms of the activemethylene group is replaced with a cyclooxy group.
活性 亚甲基上的一个 氢原子 是被环氧基所取代的。
2
An Efficient NH2SO3H-catalyzed direct alkylation of activemethylene compounds with benzylic and allylic alcohols has been reported.
报道了氨磺酸催化的活泼亚甲基化合物和醇的直接烷基化反应新方法。
3
The new method in the determination of negative ion surface-active agent is introduced, comparing with methylene blue method, it have merits of simple operation step and little dosage.