The photosynthetic preparation of N‐aryl‐ and N‐alkyl‐bearing carbazoles utilizes continuousflow, visiblelight, and an in situ formed Cu‐based sensitizer (see picture). The method is mild and efficient, and allows the straightforward synthesis of a variety of carbazoles with different substituents, heterocycles, and complex carbon architectures.
benzyne intermediate accompanied with a proton transfer process, followed by an oxidative cyclization of the generated diphenylamine to furnish the corresponding carbazole products. A facile and efficient process for the preparation of various tertiary aminobenzenes and carbazole derivatives via photoinduced cross-coupling of amines with 1,2-diiodobenzene is reported. Mechanistic investigations indicate
POLYMER COMPOUND AND POLYMER LIGHT EMITTING DEVICE USING THE SAME
申请人:OGUMA Jun
公开号:US20100066237A1
公开(公告)日:2010-03-18
A polymer compound comprising at least one of residues of compounds of the following formula (1):
(wherein, ring A, ring B and ring C represent each independently an aromatic ring or non-aromatic ring optionally having a substituent, Z
1
, Z
2
, Z
3
, Z
4
and Z
5
represent each independently C-(Q)
z
or nitrogen atom, Q represents a substituent or hydrogen atom, z represents 0 or 1, the ring A and the ring B may share an atom other than Z
5
constituting each ring, and one or more and two or less of the rings A, B and C are non-aromatic rings.).
Photochemical Synthesis of Carbazoles Using an [Fe(phen)<sub>3</sub>](NTf<sub>2</sub>)<sub>2</sub>/O<sub>2</sub> Catalyst System: Catalysis toward Sustainability
作者:Shawn Parisien-Collette、Augusto C. Hernandez-Perez、Shawn K. Collins
DOI:10.1021/acs.orglett.6b02456
日期:2016.10.7
An increasingly sustainable photochemical synthesis of carbazoles was developed using a catalytic system of Fe(phen)(3)(NTf2)(2)/O-2 under continuous flow conditions and was demonstrated on gram scale using a numbering-up strategy. Photocyclization of triaryl and diarylamines into the corresponding carbazoles occurs in general in higher yields than with previously developed photocatalysts.
Iridium/Acid Cocatalyzed Direct Access to Fused Indoles via Transfer Hydrogenative Annulation of Quinolines and 1,2-Diketones
Herein, we present an unprecedented iridium/acid cocatalyzed construction of fused indoles via transfer hydrogenative annulation of nonactivated quinolines and 1,2-diketones. The products are assembled via initial reduction followed by selective coupling of 1,2-diketones with the N and C8 sites of the quinolyl skeleton. The developed synthetic method features operational simplicity, readily available feedstocks, applicability for streamline synthesis of functional molecules, high step and atom efficiency, and generation of water as the byproduct.