1-Benzazole (CAS NO 120-72-9)
Product name: 1-Benzazole
Other name: Indole
CAS NO: 120-72-9
Appearance: White or colorless crystals with stink of feces
Purity: ≥98%,≥99%
Prepation:
It is prepared by catalytic dehydrogenation of o-aminoethylbenzene. The indole is dehydrogenated and cyclized at 550 ° C in the presence of aluminum nitrate (or aluminum oxide) in a nitrogen stream, and dihydroanthracene is obtained by distillation under reduced pressure. Further dehydrogenation at 640 ° C gave hydrazine. Other processes are also carried out by reacting o-nitrotoluene with oxalate to form o-nitrophenylpyruvate and then into α-indolecarboxylic acid, and finally by dry distillation with lime to obtain a product; aniline and acetylene are Synthesis of indole by heating at 600-650 ° C; synthesis of indole by o-carboxyphenyl glycine via 3-hydroxy-2-indole carboxylic acid and citric acid; oxidation of static blue with concentrated nitric acid or chromic acid to obtain indole; The zinc powder can be distilled to obtain indole. The mixture is also obtained by mixing nitrocinnamic acid with 10 parts of potassium indole powder, adding iron filings, and heating the mixture to obtain indole.
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