859157-70-3

Basic information

• Product Name: 3,4-bis-(5-chloro-2-methyl-thiophen-3-yl)-1-(4-methoxy-phenyl)-2,5-dihydro-1H-pyrrole
• Synonyms: 3,4-bis-(5-chloro-2-methyl-thiophen-3-yl)-1-(4-methoxy-phenyl)-2,5-dihydro-1H-pyrrole
• CAS NO: 859157-70-3
• Molecular Weight: 436.426
• Mol File: 859157-70-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 3,4-bis-(5-chloro-2-methyl-thiophen-3-yl)-1-(4-methoxy-phenyl)-2,5-dihydro-1H-pyrrole(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-bis-(5-chloro-2-methyl-thiophen-3-yl)-1-(4-methoxy-phenyl)-2,5-dihydro-1H-pyrrole(859157-70-3)
• EPA Substance Registry System: 3,4-bis-(5-chloro-2-methyl-thiophen-3-yl)-1-(4-methoxy-phenyl)-2,5-dihydro-1H-pyrrole(859157-70-3)

Safety Data

• Hazardous Substances Data: 859157-70-3(Hazardous Substances Data)

Upstream product

• 528604-96-8 5-chloro-2-methyl-3-(bromoacetyl)thiophene 
• 98550-85-7 1-(5-chloro-2-methylthiophen-3-yl)ethanone 
• 17249-82-0 2-chloro-5-methylthiophene 
• 859157-76-9 1-(5-chloro-2-methyl-thiophen-3-yl)-2-[[2-(5-chloro-2-methyl-thiophen-3-yl)-2-oxo-ethyl]-(4-methoxy-phenyl)-amino]-ethanone 

Relevant articles and documents

Study on photochromism of diarylethenes with a 2,5-dihydropyrrole bridging unit: A convenient preparation of 3,4-diarylpyrroles from 3,4-diaryl-2,5- dihydropyrroles

Symmetric and nonsymmetric diarylethenes with a 2,5-dihydropyrrole bridging unit have been prepared, and the photochromic properties are investigated. Both symmetric and nonsymmetric diarylethenes with 2,5-dihydropyrrole bridging units undergo reversible ring-opening and ring-closing photoisomerization reactions in nonpolar solvents with UV/vis light, and some of them exhibit good fatigue resistance and no marked degradation detected after 10 cycles via an on/off switch. In polar solvents, however, photochromic diarylethenes with 2,5-dihydropyrrole bridging units produce 3,4-diarylpyrrole derivatives instead of the ring-closing isomer of diarylethenes with UV light irradiation. A class of N-substituted 3,4-diphenylethenes with 2,5-dihydropyrrole bridging units were prepared and used as templates to investigate the conversion reactions. The mechanism of photoconversion of 3,4-diaryl-2,5-dihydropyrroles to 3,4-diarylpyrroles was explored as well.