273-91-6

Basic information

• Product Name: Benzoselenazole
• Synonyms: Benzoselenazole;1,3-benzoselenazole
• CAS NO: 273-91-6
• Molecular Formula: C₇H₅NSe
• Molecular Weight: 182.08
• Mol File: 273-91-6.mol
• Article Data: 5

Chemical Properties

• Boiling Point: 253.4°C at 760 mmHg
• Flash Point: 107.1°C
• Appearance: /
• Vapor Pressure: 0.0292mmHg at 25°C
• CAS DataBase Reference: Benzoselenazole(CAS DataBase Reference)
• NIST Chemistry Reference: Benzoselenazole(273-91-6)
• EPA Substance Registry System: Benzoselenazole(273-91-6)

Safety Data

• Hazardous Substances Data: 273-91-6(Hazardous Substances Data)

Usage

InChI:InChI=1/C7H5NSe/c1-2-4-7-6(3-1)8-5-9-7/h1-5H

Upstream product

• 51694-22-5 ortho-nitrophenyl selenocyanate 
• 3724-43-4 Vilsmeier reagent 
• 134174-55-3 zinc 2-aminobenzeneselenolate 
• 615-43-0 2-iodophenylamine 
• 64-18-6 formic acid 
• 63870-44-0 bis(2-aminophenyl)diselenide 
• 61053-50-7 methyl(2-nitrophenyl)selenide 
• 2565-30-2 formyl chloride 
• 70086-67-8 2-(methylselanyl)aniline 
• 859779-57-0 bis-(2-formylamino-phenyl)-diselenide 
• 35350-43-7 bis(o-nitrophenyl) diselenide 
• 854124-28-0 benzoselenazole-2-carboxylic acid 

Downstream Products

• 76801-03-1 3-(2-Bromomethyl-benzyl)-benzoselenazol-3-ium; bromide 
• 831224-76-1 bis[2-(N-acetylamino)phenyl] diselenide 

Relevant articles and documents

Synthesis of 2-Substituted 1,3-Benzoselenazoles from Carboxylic Acids Promoted by Tributylphosphine

We report a general, practical, and simple metal-free method for the synthesis of 2-substituted 1,3-benzoselenazoles by the reaction of bis(2-aminophenyl)diselenide with a wide range of carboxylic acids, promoted by tributylphosphine. This efficient reaction furnishes 2-aryl-1,3-benzoselenazoles in good yields and tolerates a variety of substituents at the aryl moiety of carboxylic acids. For the first time, 2-alkyl-1,3-benzoselenazoles could be obtained from aliphatic carboxylic acids and thiazolidine-4-carboxylic acid in high chemical yields. The use of focused microwave irradiation considerably decreased the reaction time from 48 to 2 h. The experimental data provide insights into the mechanism of the reaction. A metal-free synthesis of 2-substituted 1,3-benzoselenazoles by the reaction of bis(2-aminophenyl)diselenide with carboxylic acids, promoted by tributylphosphine is reported. For the first time, 2-alkyl-1,3-benzoselenazoles could be obtained from aliphatic carboxylic acids and thiazolidine-4-carboxylic acid in high chemical yields. Microwave irradiation reduced the reaction time.

THE 1,3-BENZOTELLURAZOLE : A NEW HETEROCYCLIC SYSTEM

We describe the synthesis of a new heterocyclic system : the 1,3-benzotellurazole, and some of its substituted derivatives.

Meso-ionic se- and s-containing tetrazoles

This invention relates to meso-ionic tetrazole compounds of the formula: STR1 wherein X- is -S- or -Se- which are useful as photographic additives and to an intermediate useful in the preparation thereof having the formula: STR2