Palladium-Catalyzed Direct Arylation for the Synthesis of Indeno[2,1-b]-pyrrol-8-ones
作者:Junbiao Chang、Chuanjun Song、Li Sun、Jingjing Dong、Zhenhua Shen、Yueteng Zhang、Jie Wu、Ruiyong Wang、Jinqian Wang
DOI:10.1055/s-0032-1317347
日期:——
Treatment of 2-bromophenyl (N-tosylpyrrol-2′-yl)-ketones with Pd(OAc)2, Ph3P, and K2CO3 resulted in the formation of indeno[2,1-b]pyrrol-8-ones in moderate to good yields.
作者:Chuanjun Song、David W. Knight、Maria A. Whatton (neé Fagan)
DOI:10.1016/j.tetlet.2004.10.133
日期:2004.12
N-Tosylpyrroles can be very efficiently converted into the corresponding 2-acylpyrroles by reaction with carboxylic acids and trifluoroacetic anhydride; little or none of the isomeric 3-acyl derivatives are formed.
2-Bromo<i>-N-</i>(<i>p-</i>toluenesulfonyl)pyrrole: A Robust Derivative of 2-Bromopyrrole
作者:John W. Huffman、Lea W. Knight、Matthew L. Isherwood
DOI:10.1055/s-2003-42036
日期:——
2-Bromo-N-(p-toluenesulfonyl)pyrrole (2), a crystalline stable derivative of 2-bromopyrrole (1) has been prepared in 80% yield by bromination of pyrrole, followed by conversion to the N-(p-toluenesulfonyl) derivative. This compound is stable indefinitely at ambient temperature. Compound 2 is an excellent substrate for Suzuki coupling with arylboronic acids.
作者:Dae Won Cho、Mamoru Fujitsuka、Jung Ho Ryu、Myoung Hee Lee、Hwan Kyu Kim、Tetsuro Majima、Chan Im
DOI:10.1039/c2cc30569k
日期:——
Novel boron dipyrromethene (BODIPY) derivatives having significant absorption and emission in the longer wavelength region were synthesized. BODIPY showed anomalous S2 emission from the second excited (S2) state at shorter wavelength. The photodynamics of the S2 state was investigated by fluorescence up-conversion and transient absorption spectroscopic measurements. The decay time of the S2 emission was dependent on the internal conversion and the intersystem crossing process. The assignments of transitions were supported by a theoretical calculation based on the time-dependent density functional theory.