A series of carbazolone derivatives and 3-acetylindoles have been achieved via PIFA-mediated intramolecular cyclization of 2-aryl enaminones. This process allows the N-moiety on the side-chain to be annulated to the benzene ring via the metal-free oxidative aromatic CâN bond formation.
Ru(II)-Catalyzed Decarbonylative Alkylation and Annulations of Benzaldehydes with Iodonium Ylides under Chelation Assistance
作者:Xiang Li、Yang Shen、Guodong Zhang、Xin Zheng、Qing Zhao、Zihe Song
DOI:10.1021/acs.orglett.2c01843
日期:2022.7.29
A Ru(II)-catalyzed decarbonylative alkylation and annulation of salicylaldehydes and 2-aminobenzaldehydes with iodonium ylides has been developed for the synthesis of dibenzo[b,d]furans and NH-free carbazolones. The reaction proceeds smoothly under mild conditions with a low catalyst loading and a broad substrate compatibility. Notably, hydroxy and free amino groups were demonstrated to be the effective
Nitrene C−H Bond Insertion Approach to Carbazolones and Indolones, and a Reactivity Departure for 7‐Membered Analogues**
作者:Mahesh K. Lakshman、Dellamol Sebastian、Padmanava Pradhan、Michelle C. Neary、Alexis M. Piette、Samuel P. Trzebiatowski、Alexander E. K. Henriques、Patrick H. Willoughby
DOI:10.1002/chem.202302995
日期:2023.12.22
2-Arylcyclohexane-1,3-diones and 2-arylcyclopentane-1,3-diones can be converted in a facile 2-step, 1-pot manner to 2-aryl-3-azidocycloalk-2-en-1-ones. These azides can be smoothly cyclized to carbazolones and indolones with catalytic Rh2(O2CC7H15)4. Although 3-azido-2-phenylcyclohept-2-en-1-one could be readily prepared from 2-phenylcycloheptane-1,3-dione, by contrast the Rh-catalyzed cyclization
2-芳基环己烷-1,3-二酮和2-芳基环戊烷-1,3-二酮可以通过简单的两步、一锅法转化为2-芳基-3-叠氮基环烷-2-en-1-酮。这些叠氮化物可以在催化Rh 2 (O 2 CC 7 H 15 ) 4的作用下顺利环化为咔唑酮和吲哚酮。虽然 3-叠氮基-2-苯基环庚-2-en-1-酮可以很容易地从 2-苯基环庚烷-1,3-二酮制备,但相比之下,Rh 催化的环化反应优先于吲哚生成氮丙啶。机理和 DFT 研究补充了综合工作。
10.56042/ijc.v63i5.9286
作者:Uludag, Nesimi
DOI:10.56042/ijc.v63i5.9286
日期:——
An Easy Access to Carbazolones and 2,3-Disubstituted Indoles
作者:Donala Janreddy、Veerababurao Kavala、J. W. John Bosco、Chun-Wei Kuo、Ching-Fa Yao
DOI:10.1002/ejoc.201001357
日期:2011.4
Synthesis of carbazol-4-ones, 3,4-dihydrocyclopental-indol-1-one, and indole derivatives by a Fe/AcOH-mediated intramolecular reductive N-heteroannulation of 3-hydroxy-2-(2-nitrophenyl)enones is demonstrated. The same protocol has been extended to access indolocarbazolone and indoloquinolone derivatives.