phosphorus chloride
2.The compound 2 reacted with phosphorus oxych-loride in the presence of triethylamine to get 2-(1-chloroethyl)-4-nitropyridine(3), with phosphorus trichloride to get 2-ethyl-4-nitropyridine(4), and with acetyl chloride to get 4-chloro-2-ethylpyridine-1-oxide(5) respectively.
3.a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus.
4.7-Acetamide-4-hydroxy-2-naphthalenesulfonyl chloride was synthesized with yield of 92% by treatment of 7-acetamide-4-hydroxy-2-naphthalene sodium sulphate with phosphorus oxychloride in the presence of N,N-dimethylacetamide(DMA) in acetonitrile. It.
5.(2)BDP: In presence of aluminium chloride as catalysis, the molar ratio of phosphorus oxytrichloride, bisphenol A and phenol was 5.5:1:4.04. The appropriate calefactive time to the reaction temperature (105~118℃) was about 0.5h and the reaction time was 3.5~4h in the condensation reaction.
6.N-(2-chloro-phenyl)-N-hydroxyformamide is prepared from o-chl-oronitrobenzene as reduction with formic acid/acetic anhydride . is converted to clonidine by cholorination with thionyl chloride/phosphorus pentachloride and then cycliation with ethye-nediamine. This method siplified the operation and reduced the cost.
