The Pd‐catalyzed direct arylation of 2,1‐benzisoxazole with arylbromides to access 3‐arylbenzoisoxazoles proceeds in moderate‐to‐high yields with 1 mol % Pd(OAc)2 or 2 mol % PdCl(C3H5)(dppb) (dppb=1,4‐bis(diphenylphosphino)butane) as the catalysts and KOAc as an inexpensive base. A wide variety of (hetero)arylbromides have been employed successfully. Moreover, arylations followed by benzisoxazole
Pd催化2,1-苯并恶唑与芳基溴的直接芳基化反应以生成3-芳基苯并异恶唑,其产率为中至高,产率为1 mol%Pd(OAc)2或2 mol%PdCl(C 3 H 5)(dppb )(dppb = 1,4-双(二苯基膦基)丁烷)作为催化剂,KOAc作为便宜的碱。已经成功地使用了各种各样的(杂)芳基溴化物。此外,芳基化反应后再开苯并异恶唑开环,仅需两个步骤即可制备2-氨基二苯甲酮。
QUINOLINIUM ION DERIVATIVES, PROCESS FOR THE PRODUCTION OF THE DERIVATIVES, PRODUCTS MADE BY USING THE SAME, AND REDUCTION AND OXIDATION METHODS WITH THE DERIVATIVES
申请人:Fukuzumi Shunichi
公开号:US20100004454A1
公开(公告)日:2010-01-07
An electron donor-acceptor dyad is provided that can provide a charge-separated state with longevity and not only high oxidizing power but also high reducing power. A compound of the present invention is a quinolinium ion derivative represented by the following formula (I), a stereoisomer or tautomer thereof, or a salt thereof:
where R
1
is a hydrogen atom or an alkyl group, and Ar
1
to Ar
3
each are a hydrogen atom or an electron-donating group. The compound of the present invention has the above-mentioned structure and therefore can provide a charge-separated state with longevity and not only high oxidizing power but also high reducing power and can be used for various products such as photocatalysts, photosensitizers, dyes, oxidants, reductants, dye-sensitized solar cells, and organic EL devices.
PROCESS FOR PRODUCTION OF OXIDATION REACTION PRODUCT OF AROMATIC COMPOUND
申请人:Ohkubo Kei
公开号:US20120171111A1
公开(公告)日:2012-07-05
The present invention provides a process for producing an oxidation reaction product of an aromatic compound, having excellent environmental load reduction performance, cost reduction performance, etc. Provided is a process for producing an oxidation reaction product of a raw material aromatic compound by reacting the raw material aromatic compound with an oxidizing agent. The process further uses an electron donor-acceptor linked molecule. The process includes the step of: reacting the electron donor-acceptor linked molecule in an electron-transfer state, the oxidizing agent, and the raw material aromatic compound, thereby generating an oxidation reaction product resulting from oxidation of the raw material aromatic compound.
An atroposelective Friedländer heteroannulation reaction of 2-aminoaryl ketones with α-methylene carbonyl derivatives has been developed for the first time with chiral phosphoric acid as an efficient organocatalyst. The desired enantioenriched axially chiral polysubstituted 4-arylquinoline architectures were prepared with good to high yields and enantioselectivities (up to 94% yield and up to 97% ee)
phosphoranyl radical chemistry allows for precise cleavage of a stronger C-O bond and formation of a weaker C-Cbond by 1,5-aryl migration under mild reaction conditions. This new protocol is independent of substrate redox-potential, electronic, and substituent effects. It affords a general and promising access to 60 examples of synthetically versatile o-amino and o-hydroxy diaryl ketones under redox-neutral