Rh(III)‐Catalyzed Annulative Coupling of Sulfoxonium Ylides with Allyl Acetates: Generation of Bicyclo[4.1.0]heptan‐2‐ones
作者:Wei Chi、Hao Liu、Yi Luo、Lin Dong
DOI:10.1002/ejoc.202300389
日期:2023.7.21
C−H activation strategy to build cyclopropanes: A highlyefficientrhodium(III)-catalyzed annulative coupling was developed for generating bicyclo[4.1.0]heptan-2-ones from sulfoxonium ylides and allyl acetates undermildconditions. This cascade reaction is versatile to construct cyclopropanes, and the starting materials are stable and easily obtainable.
activation and cyclization of sulfoxonium ylide with ally esters leads to the formation of a cyclopropane-fused tetralonederivative by cascade C–H activation, (4+2) annulation, and cyclopropanation. A similar reaction of sulfoxonium ylide with allyl carbamates forms a C3-substituted indanonederivative via a rare and interesting domino C–H activation and (4+1) annulation in which allyl carbamate is acting
516. Tropolones. Part IX. 2 : 3-Dihydro-2 : 3-methylene-1 : 4-naphthaquinone
作者:G. L. Buchanan、J. K. Sutherland
DOI:10.1039/jr9560002620
日期:——
Fraisse-Jullien,R.; Frejaville,C., Bulletin de la Societe Chimique de France, 1970, p. 219 - 230
作者:Fraisse-Jullien,R.、Frejaville,C.
DOI:——
日期:——
Gold-Catalyzed Oxidative Cyclization of 1,5-Enynes Using External Oxidants
作者:Dhananjayan Vasu、Hsiao-Hua Hung、Sabyasachi Bhunia、Sagar Ashok Gawade、Arindam Das、Rai-Shung Liu
DOI:10.1002/anie.201102581
日期:2011.7.18
Golden circle: Two gold‐catalyzed oxidativecyclizations of 1,5‐enynes using 8‐methylquinoline N‐oxide are presented (see example). Experimental results indicate that both reactions proceed through prior oxidation of alkyne to form α‐carbonyl intermediates and subsequent intramolecular carbocyclization.