Transition metal and base-free synthesis of 3,3-diaryl-2-oxindoles from 2,2,N-triarylacetamides
作者:Jin Woo Lim、Ko Hoon Kim、Hye Ran Moon、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2016.01.024
日期:2016.2
A transitionmetal and base-free synthesis of 3,3-diaryl-2-oxindoles has been developed from 2,2,N-triarylacetamides in the presence of montmorillonite K-10 in 1,2-dichlorobenzene under O2 balloon atmosphere.
Highly Site-Selective Direct C–H Bond Functionalization of Unactivated Arenes with Propargyl α-Aryl-α-diazoacetates via Scandium Catalysis
作者:Balu S. Navale、Debasish Laha、Subhrashis Banerjee、Kumar Vanka、Ramakrishna G. Bhat
DOI:10.1021/acs.joc.2c01185
日期:2022.11.4
Highly chemo- and regio-selective C–H bond functionalization of unactivated arenes with propargyl α-aryl-α-diazoacetates has been developed using scandium catalysis. A variety of unactivated, mildly deactivated, and electronically activated arenes have been functionalized using this protocol. The synergistic combination of scandium triflate as a catalyst and propargyl α-aryl-α-diazoacetate as a reagent
A synthetic route to 2-O-(diphenylacetyl)salicylic acid derivatives was developed and the effects of the products on the heat-denaturation of albumin and on heat-induced erythrocytolysis were examined (in vitro anti-inflammation test). Trichloroethyl salicylate was acylated with diphenylacetic acid and its derivatives in the presence of methanesulfonyl chloride and pyridine, and the products were deprotected with zinc-acetic acid to give 2-O-(diphenylacetyl)salicylic acid derivatives. Their biological effects resembled those of ibuprofen.