A versatile, traceless C–H activation-based approach for the synthesis of diversified heterocycles is reported. Rh(III)-catalyzed, N-amino-directed C–H alkenylation generates either olefination products or indoles (in situ annulation) in an atom- and step-economic manner at room temperature. The remarkable reactivity endowed by this directing group enables scale-up of the reaction to a 10 g scale at
Co(III)-catalyzed, internal and terminal alkyne-compatible indole synthesis protocol is reported herein. The N-amino (hydrazine) group imparts distinct, diverse reactivity patterns for directed C–H functionalization/cyclization reactions. Notable synthetic features include regioselectivity for a meta-substituted arylhydrazine, regioselectivity for a chain-branched terminalalkyne, formal incorporation of
A hydrazine-directed Rh(<scp>iii</scp>) catalyzed (4+2) annulation with sulfoxonium ylides: synthesis and photophysical properties of dihydrocinnolines
作者:Pothapragada S. K. Prabhakar Ganesh、Perumal Muthuraja、Purushothaman Gopinath
DOI:10.1039/d1cc06353g
日期:——
catalyzed (4+2) annulation of N-alkyl aryl hydrazines with sulfoxonium ylides as a safe carbene precursor. The reaction shows excellent functional group tolerance with broad substrate scope, scalability and site selectivity. Finally, photophysical studies indicated that some of these compounds have interesting fluorescence properties.
我们在此报告了肼定向、Rh( III ) 催化的 (4+2) N-烷基芳基肼与锍叶立德的环化反应,作为一种安全的卡宾前体。该反应显示出优异的官能团耐受性,具有广泛的底物范围、可扩展性和位点选择性。最后,光物理研究表明,其中一些化合物具有有趣的荧光特性。
Rh(III)-Catalyzed <i>N</i>-Amino-Directed C–H Coupling with 3-Methyleneoxetan-2-ones for 1,2-Dihydroquinoline-3-carboxylic Acid Synthesis
polarity and revealing expanded reactivity patterns. Through this analysis formalism, polarity matching has been established for Rh(III)-catalyzed N-amino-directed C–H coupling with 3-methyleneoxetan-2-ones, providing efficient access to 1,2-dihydroquinoline-3-carboxylic acids. The identified reaction, by virtue of the internal oxidative mechanism, showcases mild reaction conditions (room temperature),
The nitrogen-containing heterocyclic compound or the pharmaceutically acceptable salt thereof of the present invention is useful as a prophylactic and/or therapeutic agent for, for example, skin diseases and the like.
The present invention provides a heterocyclic compound represented by the following formula (I)
wherein, XA represents CH and the like, R1 represents cycloalkyl optionally having substituent(s) and the like, L represents a bond and the like, YA represents -NH- and the like, R2 represents a hydrogen atom and the like, R3A represents the following formula (R3A-1) (wherein, R3 represents hydroxy and the like) and the like, and R4A represents the following formula (R4A-1) (wherein, R4 and R5 are the same or different and each represents a hydrogen atom and the like) and the like}, or a pharmaceutically acceptable salt thereof, which is useful as a prophylactic and/or therapeutic agent for skin diseases and the like, and the like.