Unsymmetrical BODIPY dyes carrying four aryl moieties in positions 1, 3, 5, and 7 can be assembled in a modular fashion from pyrrole building blocks individually produced in two separate [6π] electrocyclizations. The method uses benzaldehydes, acetophenones, and glycine nitrile or glycine ethyl ester as the starting materials.
Pyrromethene metal complex and light emitting device composition and light emitting devices using the same
申请人:——
公开号:US20030082406A1
公开(公告)日:2003-05-01
A pyrromethene metal complex is used as a fluorescent dye to form a light emitting device. The light emitting device has a substance which brings about light emission between an anode and a cathode. By applying electrical energy, the device generates emission having an emission peak wavelength of 580 to 720 nm. The device contains at least one of: a diketopyrrolo[3,4-c]pyrrole derivative and an organic fluorescent material having a fluorescent peak wavelength of 580 to 720 nm; and a light emitting device composition containing a pyrromethene metal complex.
Synthesis of polysubstituted pyrroles via [3 + 2]-annulation of aziridines and β-nitroalkenes under aerobic conditions
作者:Shaoyin Wang、Xiancui Zhu、Zhuo Chai、Shaowu Wang
DOI:10.1039/c3ob42324g
日期:——
Polysubstituted pyrroles were regioselectively synthesized in moderate to good yields via the copper acetate-catalyzed [3 + 2] annulation reaction of readily accessible aziridines and nitroalkenes. This reaction was proposed to proceed through a key azomethine ylide intermediate generated by selective C–C bond cleavage of the aziridine followed by annulation with nitroalkenes under aerobic conditions
A Convenient Synthesis of 2-Aroyl-5-arylpyrroles 2-Aroyl-5-arylpyrroles are prepared in 20-60% yields by cyclocondensation of 1,5-diaryl-2-methylsulfinyl-1,5-pentanediones with ammonium acetate in acetic acid.
Three-Component Synthesis of Polysubstituted Pyrroles from α-Diazoketones, Nitroalkenes, and Amines
作者:Deng Hong、Yuanxun Zhu、Yao Li、Xufeng Lin、Ping Lu、Yanguang Wang
DOI:10.1021/ol201891r
日期:2011.9.2
Polysubstituted pyrroles are regiospecifically synthesized via the copper-catalyzed three-component reaction of α-diazoketones, nitroalkenes, and amines under aerobic conditions. The cascade process involves an N–H insertion of carbene, a copper-catalyzed oxidative dehydrogenation of amine, and a [3 + 2] cycloaddition of azomethine ylide.