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。