Ethyl phenylacrylate intermediate bringing a double bond was introduced first,which is subsequently transformed into triketone and then DCM was obtained with high purity.
采用具有烃骨架的β-苯基丙
为中
体先
键,再经过三酮合环制备乙
基吡喃。
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So there's essentially a traveling pool of urea that escapes the urine, finds its way back into the loop of Henle, and then runs the whole course again back to the collecting duct — an ammonia-scented cycle called urea recycling.
这就形成了一个流动的尿素池尿素从尿液中逸出,找到了回到亨氏袢系统的路,然后再经过整个过程回到收集管道——这个散发着氨香味的循环叫做尿素回收。