61360-89-2

Usage

Appearance

Yellow crystalline powder

Usage

Synthesis of organic compounds and pharmaceuticals

Chemical structure

Nitro group and methyl groups attached to the indole ring

Steric hindrance

High level due to the presence of nitro and methyl groups

Classification

Sterically hindered amine

Application

Reagent in organic synthesis for the introduction of the tetramethylpyrrole moiety

Potential properties

Anti-oxidant and anti-inflammatory

Safety precautions

Should be handled carefully and in accordance with proper safety measures due to potential hazards

Upstream product

• 13034-76-9 1,2,3,3-tetramethylindoline 
• 1640-39-7 2,3,3-trimethylindoleniune 
• 5418-63-3 1,2,3,3-tetramethyl-3H-indolium iodide 
• 118-12-7 1,3,3-Trimethyl-2-methyleneindoline 

Relevant academic research and scientific papers

NOVEL SQUARYLIUM COMPOUNDS, AND COMPOSITIONS COMPRISING SAME

The present disclosure is disclosed herein. The present invention relates to a novel squarylium compound and a near infrared absorbing resin composition containing the squarylium compound.

Squarylium dyestuffs and compostions containing same

Novel squarylium dyestuffs are formed by condensing one molecular equivalent of squaric acid with two molecular equivalents of a heterocyclic intermediate of the formula STR1 in which X is an optionally substituted ethylene or o-phenylene group; Y is an optionally substituted methylene or imino group, oxygen, sulfur, selenium or (if X is ethylene) a direct bond; and R1 through R5 are various substituents or (except for R2 and R5) hydrogen. A preferred class of dyestuffs are those formed from intermediates in which Y is methylene or a direct bond, the former including 7-acylaminotetrahydroquinolines and the latter including 6-acylaminoindolines. Thus, two molecular equivalents of each of 1-methyl-7-acetamido-1,2,3,4-tetrahydroquinoline and 6-acetamido-1,2,3, 3-tetramethylindoline were condensed with one molecular equivalent of squaric acid to produce respective dyes each having an absorption maximum substantially coincident with the ruby-laser wavelength of 694 nm. The dyes may be incorporated into suitable transparent plastics such as polycarbonate for use in optical filters.

Substituted 2-methyl- and 2-methyleneindolines. 2. Nitro- and amino-substituted 2-methyl- and 2-methylene-indolines

From 5- and 6-aminotetramethylindolines, 2-methyleneindolines have been synthesized; these compounds can be condensed with other heterocyclic systems. The nitration of 1,2,3,3-tetramethylindoline under different conditions was studied.