22312-61-4Relevant articles and documents
Method for reducing aromatic nitro into arylamine
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Paragraph 0169-0172, (2020/07/15)
The invention relates to a method for reducing aromatic nitro to arylamine. The method comprises the following steps: (1) taking an aromatic nitro compound as a raw material, water as a hydrogen source, a palladium compound, cheap and easy to obtain, as a catalyst and tetrahydroxydiboron as an additive to reduce nitro to obtain a product; (2) taking the aromatic nitro compound as the raw material, a copper salt, cheap and easy to obtain, as the catalyst, the tetrahydroxydiboron as the additive to reduce the nitro to obtain a product; and (3) taking the aromatic nitro compound as the raw material, water as the hydrogen source, and the tetrahydroxydiboron as the additive, without needing a metal catalyst, to reduce the nitro to obtain a product. A preparation method for the arylamine, which is provided by the invention, is mild in reaction condition, low in costs, environment-friendly, high in yield, and suitable for industrial production.
2 - (2 - Chlorophenyl) quinazoline -4 (3H) - ketone derivative as well as preparation method and application thereof (by machine translation)
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Paragraph 0069; 0074-0076, (2019/08/06)
The invention discloses 2 - (2 - chlorophenyl) quinazoline -4 (3H) - a ketone derivative represented by the following formula (I) or a pharmaceutically acceptable salt thereof. Compared, the traditional Chinese medicinal diazepam, midazolam, and midazolam
Sulfur-Promoted Synthesis of 2-Aroylquinazolin-4(3H)-ones by Oxidative Condensation of Anthranilamide and Acetophenones
Nguyen, Thanh Binh,Hou, Jing-ya,Retailleau, Pascal
, p. 3337 - 3341 (2019/06/13)
A sulfur-promoted three-component reaction of isatoic anhydride, primary aliphatic or aromatic amines, and acetophenones leading to densely substituted 3-substituted 2-aroylquinazolin-4(3H)-ones is reported. The key step involves a cascade reaction of selective oxidation of the methyl group of the acetophenones, followed by a condensation with anthranilamides. The scope of the reaction is applicable to the synthesis of tryptanthrin and various 3-unsubstituted 2-aroylquinazolin-4(3H)-ones. (Figure presented.).