3169-61-7Relevant articles and documents
Photocatalyzed Intramolecular [2+2] Cycloaddition of N-Alkyl-N-(2-(1-arylvinyl)aryl)cinnamamides
de Souza, Wanderson C.,Matsuo, Bianca T.,Matos, Priscilla M.,Correia, José Tiago M.,Santos, Marilia S.,K?nig, Burkhard,Paix?o, Marcio W.
supporting information, p. 3722 - 3728 (2021/02/03)
N-Alkyl-N-(2-(1-arylvinyl)aryl)cinnamamides are converted into natural product inspired scaffolds via iridium photocatalyzed intramolecular [2+2] photocycloaddition. The protocol has a broad substrate scope, whilst operating under mild reaction conditions. Tethering four components forming a trisubstituted cyclobutane core builds rapidly high molecular complexity. Our approach allows the design and synthesis of a variety of tetrahydrocyclobuta[c]quinolin-3(1H)-ones, in yields ranging between 20–99 %, and with excellent regio- and diastereoselectivity. Moreover, it was demonstrated that the intramolecular [2+2]-cycloaddition of 1,7-enynes—after fragmentation of the cyclobutane ring—leads to enyne-metathesis-like products.
INDENOACRIDINE COMPOUND AND APPLICATIONS THEREOF
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Paragraph 0109-0111, (2021/08/04)
PROBLEM TO BE SOLVED: To provide: a novel indenoacridine compound better in stability against redox and in hole transportability than known conventional compounds; and an organic EL element based on the indenoacridine compound. SOLUTION: An indenoacridine compound represented by general formula (1) or (2) is used. SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
Efficient synthesis of SCF3-substituted tryptanthrins by a radical tandem cyclization
Guo, Jincheng,Hao, Yanan,Li, Gang,Li, Yongqiang,Liu, Yuxiu,Wang, Qingmin,Wang, Ziwen
supporting information, p. 1994 - 2001 (2020/03/23)
Herein, we report a new, efficient and atom-economical strategy for the synthesis of SCF3-substituted tryptanthrin derivatives. These previously unreported derivatives were obtained by means of a radical tandem cyclization. The reaction was triggered by addition of a SCF3 radical to a carbon-carbon double bond and involved the formation of a C(sp3)-SCF3 bond, a C(sp2)-C bond, and a C(sp2)-N bond. This method has mild conditions and a wide range of substrates which is particularly useful for the preparation of substituted indolquinazoline derivatives that widely exist in many natural products, but are not easy to obtain by conventional approaches.
