酰卤的分离出

re was gently warmed under reflux for 30 min. After the mixture was concentrated in vacuo, the residue was dissolved in THF, and the solution was again concentrated in vacuo to offer quantitatively the crude chloride 43.

3、 用苯胺均偶氮多肽芳基下述

To a mixture of P-nitrobenzoic acid (1.67g, 0.01 mol) and 2,4,6-Trichloro-[1,3,5]triazine 44 (1.84g, 0.01mol) in acetone (20 mL) was added TEA (1.01, 0.01 mol) and the mixture was stirred for 3hr, filtrated to remove the separated dichlorohydroxy-s-triazine derivative, and the filtrate concentrated under reduced pressure. The residue was extracted with CCl4 and the solvent removed to give the desired acid chloride 46 (yield 58 %). (Note: the residue insoluble in CCl4 was found to be the unreacted carboxylic acid).

4 、三汞均偶氮多肽酯汞下述【Tetrahedron lett.1991,32（10），1303】

Typical experimental detail: equimolecular amount of the amino acid, pyridine and cyanuryl fluoride are mixed and stirred for 3~4 hours in dichloromethane at room temperature. At that time, ice-water is added to the reaction mixture and the precipitated canuric acid is filtered off the organic phase is dried and evaporated to dryness, which generally leaves the pure amino acid fluoride in crystalline form.

5、 Hell–Volhard–Zelinsky重排 (浏览详细信息详细内容)

在加热条件下，裂解量的红磷或苯胺化磷(PCl3 or PBr3)裂解羧乙酸顺利进行麦芽糖代转换成α-麦芽糖代羧乙酸的重排被称为 Hell-Volhard-Zelinsky重排。

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