77123-94-5

Upstream product

• 96-54-8 N-Methylpyrrole 
• 56454-27-4 5-bromo-1-methyl-1H-pyrrole-2-carboxylic acid 

Downstream Products

• 1158523-74-0 1-methyl-4,5,6,7-tetraphenyl-1H-indole 
• 1318075-47-6 1-methyl-4,5,6,7-tetrakis(4-methoxyphenyl)-1H-indole 
• 1185863-86-8 1-methyl-4,5,6,7-tetrakis(4-methylphenyl)-1H-indole 

Relevant academic research and scientific papers

Thermally reversible novel photochromic dihydroindoles

Thermally reversible novel photochromic 4,5- and 6,7-dihydroindoles possessing a hexafluoropropano-bridge, a spiro-adamantane moiety and a phenyl group were synthesized and their photochemical forward as well as thermal back reactions were investigated. W

Dual donor-π-acceptor type organic dyes for efficient dye-sensitized solar cells

A series of novel triphenylamine (TPA)-based dyes that use double linkers between the electron donor and the electron acceptor are synthesized, characterized, and applied as photosensitizers for dye-sensitized solar cells. The dyes contain N-methylpyrrole (NMP) (MTPA-2 dye) and styrene (St) (STPA-2 dye), respectively, linkers on TPA. These linkers are expected to generate effective π-conjugation forming donor-π-acceptor (D-π-A) links. The photovoltaic performance of the dyes depends on the linker type. For the dual-St-π-linked dye, the charge transfer from the excited dye molecules to the conduction band of TiO2 is improved, making the efficiency of the corresponding devices higher than those of dye-based devices with NMP linkers and no linkers. The device with the dye bearing positions of C3 and C4 on NMP linkers has the lowest conjugation effect and efficiency. In particular, the STPA-2 dye shows a broad incident-photon-to-current conversion efficiency response with a signal of up to 700 nm, covering most of the ultraviolet-visible light region. Device efficiencies of 5.43% and 7.56% for dye-sensitized devices using the STPA-2 dye and the cis-RuL2(NCS)2 (N3) dye, respectively, were fabricated using the same method and measured under AM 1.5 irradiation.

Synthesis of 2- and 3-substituted N-methylpyrroles

A reliable method of synthesis of 3-bromo-N-methylpyrrole by the use of N-bromosuccinimide and a catalytic amount of PBr3 is reported. The method described opens a facile route to a variety of 3-substituted pyrroles, which are otherwise difficult to access. In addition, conditions under which pure 2-bromo-N-methylpyrrole can be obtained have been established.

The Reaction of Pyrroles with Trimethylhalosilanes-Dialkyl Sulfoxides

Pyrroles are powerful nucleophiles in the reaction with dialkyl sulfoxides and trimethylchlorosilane (TMCS) or trimethylbromosilane (TMBS), affording sulfonium salts or halo derivatives, generally in good yields.

Bromination and Chlorination of Pyrrole and Some Reactive 1-Substituted Pyrroles

Monobromination of pyrrole and 1-methyl-, 1-benzyl-, and 1-phenylpyrrole with 1 mol of N-bromosuccinimide in tetrahydrofuran results in the regiospecific formation of the 2-bromopyrroles.A little disubstitution is observed.Similarly, brominations with 2, 3, or 4 mol of NBS form primarily the di-, tri-, and tetrabromopyrroles, respectively.The thermodynamically more stable 3-bromopyrroles are the major monobrominated products observed when bromine is used as the brominating agent due to isomerization of the 2-bromopyrroles with hydrogen bromide.These reaction mixtures are further complicated because of disproportionation reactions.Chlorination with N-chlorosuccinimide gave results similar to those for the bromination with NBS, but the reaction is not as selective.