Phenanthroline-<i><sup>t</sup></i>BuOK Promoted Intramolecular C–H Arylation of Indoles with ArI under Transition-Metal-Free Conditions
作者:Xiang-Huan Shan、Bo Yang、Hong-Xing Zheng、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.orglett.8b03449
日期:2018.12.21
variety of substituted 6H-isoindolo [2, 1-a] indoles were prepared by a simple and efficient intramolecular cyclization using 1,10-phenanthroline in the presence of potassium tert-butoxide and chlorobenzene. This strategy provides a fast and versatile access to isoindolo[2,1-a]indole derivatives for the synthesis of pharmaceuticals and organic electroluminescent (EL) materials.
已经开发出第一个实例,菲咯啉t BuOK促进了N-(2-碘苄基)吲哚的分子内自由基C–H芳基化,而没有过渡金属的参与。在叔丁醇钾和氯苯存在下,使用1,10-菲咯啉通过简单有效的分子内环化反应制备了多种取代的6 H-异吲哚并[2,1-a]吲哚。该策略为异吲哚并[2,1- a ]吲哚衍生物的合成提供了快速而通用的途径,用于合成药物和有机电致发光(EL)材料。
Acid-catalyzed oxidative cross-coupling of acridans with silyl diazoenolates and a Rh-catalyzed rearrangement: two-step synthesis of γ-(9-acridanylidene)-β-keto esters
作者:Weiyu Li、Hao Xu、Lei Zhou
DOI:10.1039/d1ob00691f
日期:——
oxidative cross-coupling of acridans and silyl diazoenolates and a Rh2(OAc)4-catalyzed rearrangement of the resultant diazo products are described. The reactions provide various γ-(9-acridanylidene)-β-keto esters in good yields, which bear an active α-methylene unit for further functionalization.
PROCESS FOR PRODUCING AMINOALKYLSULFONIC ACID AND METHOD OF SALT EXCHANGE FOR SALT THEREOF
申请人:Wako Pure Chemical Industries, Ltd.
公开号:EP1548002A1
公开(公告)日:2005-06-29
The present invention relates to a method for efficiently producing an aminoalkylsulfonic acid in an industrial scale, and provides
"a process for producing an aminoalkylsulfonic acid represented by the general formula [2]:
wherein R1 and R2 are each independently a hydrogen atom, an alkyl group, an aryl group or an aralkyl group; and R3 and R4 are each independently a hydrogen atom or an alkyl group,
comprising reacting an aminoalkylsulfonate salt represented by the general formula [1]:
wherein M is an alkali metal atom, an organic ammonium ion or an ammonium ion; and R1 to R4 are the same as described above,
an aqueous solution thereof, or a solution dissolving any one of them in a water-soluble organic solvent, selected from alcohols having 1 to 3 carbon atoms, carboxylic acids having 2 to 12 carbon atoms and dimethylformamide, with an organic acid; and
a method of salt exchange for an aminoalkylsulfonate salt represented by the general formula [1']:
wherein M' is an alkali metal atom, an organic ammonium ion or an ammonium ion; and R1 and R4 are the same as described above, comprising reacting an aminoalkylsulfonate salt represented by the above general formula [2] with a hydroxide represented by the general formula [6]:
M'OH [6]
wherein M' is the same as described above,
in an alcohol or water".
Iodosonaphthoate catalysts for the cleavage of a reactive phosphate
作者:Robert A. Moss、Hongmei Zhang、Swati Chatterjee、Karsten Krogh-Jespersen
DOI:10.1016/s0040-4039(00)60763-3
日期:1993.3
Iodosonaphthoates 3–5 are potent catalysts for the hydrolysis of -nitro-phenyldiphenyl phosphate.
碘代磺酸钠3–5是水解-硝基-苯基二苯基磷酸酯的有效催化剂。
PROCESS FOR PRODUCING ESTER COMPOUND
申请人:Imazeki Shigeaki
公开号:US20100324314A1
公开(公告)日:2010-12-23
PROBLEM
To provide an environmentally-friendly method for producing industrially an ester compound.
SOLUTION
The present invention is a method for producing an ester compound which comprises subjecting a carboxylic acid and an alcohol to dehydration-condensation reaction using an involatile acid catalyst and then removing the residual acid catalyst by bringing a weak basic substance into contact with the residual acid catalyst.