Aerobic oxidative C–H/C–H coupling of azaaromatics with indoles and pyrroles in the presence of TiO<sub>2</sub>as a photocatalyst
作者:I. A. Utepova、M. A. Trestsova、O. N. Chupakhin、V. N. Charushin、A. A. Rempel
DOI:10.1039/c5gc00753d
日期:——
In this paper we wish to report a highly selective and benign method for the double C-H/C-H coupling of azaaromatics with indoles or pyrrole in the presence of air oxygen/TiO2,...
Oxidative C-H/C-H Coupling of Dipyrromethanes with Azines by TiO2-Based Photocatalytic System. Synthesis of New BODIPY Dyes and Their Photophysical and Electrochemical Properties
作者:Maria A. Trestsova、Irina A. Utepova、Oleg N. Chupakhin、Maksim V. Semenov、Dmitry N. Pevtsov、Lyubov M. Nikolenko、Sergey A. Tovstun、Anna V. Gadomska、Alexander V. Shchepochkin、Gregory A. Kim、Vladimir F. Razumov、Irina B. Dorosheva、Andrey A. Rempel
DOI:10.3390/molecules26185549
日期:——
Oxidative C-H/C-H coupling reactions of dipyrromethanes with azines in the presence of a heterophase oxidative photocatalytic system (O2/TiO2/visible light irradiation) were carried out. As a result of cyclization of obtained compounds with boron trifluoride etherate, new hetaryl-containing derivatives of 4,4-difluoro-4-boron-3a,4a-diaza-s-indacene were synthesized. For the obtained compounds, absorption
A facile, metal-free, oxidative coupling of new 6-(hetero)aryl-[1,2,5]-oxadiazolo[3,4-b]pyrazines with pyrroles, indoles and carbazoles
作者:Yuriy A. Kvashnin、Nikita A. Kazin、Egor V. Verbitskiy、Tatyana S. Svalova、Alla V. Ivanova、Alisa N. Kozitsina、Pavel A. Slepukhin、Gennady L. Rusinov、Oleg N. Chupakhin、Valery N. Charushin
DOI:10.3998/ark.5550190.p009.828
日期:——
A facile, transition metal free, one-pot oxidative coupling reaction between 6-(hetero)aryl[1,2,5]oxadiazolo[3,4-b]pyrazines and pyrroles, indoles or carbazoles is reported. This atomeconomic C-H functionalization procedure requires only stoichiometric amounts of reacting heterocycles and an appropriate Lewis acid, as catalyst. The structures of representative new 5,6di(hetero)aryl-[1,2,5]oxadiazolo[3
据报道,6-(杂)芳基[1,2,5]恶二唑并[3,4-b]吡嗪与吡咯、吲哚或咔唑之间发生了一种简便、无过渡金属的一锅氧化偶联反应。这种原子经济的 CH 官能化过程只需要化学计量的反应杂环和合适的路易斯酸作为催化剂。具有代表性的新型 5,6di(hetero) 芳基-[1,2,5] 恶二唑并 [3,4-b] 吡嗪的结构通过 X 射线晶体学得到证实。还对带有咔唑单元的新化合物进行了氧化还原和光学测量。
Atom- and step-economical nucleophilic arylation of azaaromatics via electrochemical oxidative cross C–C coupling reactions
作者:O. N. Chupakhin、A. V. Shchepochkin、V. N. Charushin
DOI:10.1039/c7gc00789b
日期:——
asymmetrical bi(het)aryls through direct functionalization of the C(sp2)–Hbond in azaaromatics with fragments of (hetero)aromatic nucleophiles has first been carried out under electrochemicaloxidative conditions. This versatile method for C–C bond formation between two aryl fragments can be realized under very mild potential-controlled oxidative conditions, and it does require neither incorporation of any
Direct C-C-coupling of ferrocenyl- and cymantrenyllithium with 5-(het)aryl-1,2,5-oxadiazolo[3,4-b]pyrazines
作者:I. A. Utepova、A. A. Musikhina、Yu. A. Kvashnin、M. A. Shcherbakova、P. O. Serebrennikova、G. L. Rusinov、O. N. Chupakhin
DOI:10.1007/s11172-011-0389-z
日期:2011.12
A direct C-C-coupling of ferrocenyl- and cymantrenyllithium with 5-(het)aryl-1,2,5- oxadiazolo[3,4-b]pyrazines was accomplished. Main characteristics of the S N H-reaction products were obtained, as well as crystallographic data on the spatial structure of oxadiazolopyrazinylferrocenes and -cymantrenes synthesized.