16693-98-4Relevant articles and documents
Visible-light-triggered direct benzoyloxylation of electron-rich arenes at room temperature without chelation assistance
Rao, Honghua,Wang, Ping,Li, Chao-Jun
supporting information, p. 6503 - 6507 (2013/01/15)
A RuII photocatalytic method was developed for the direct mono-benzoyloxylation of electron-rich aromatic and heteroaromatic systems even with an excess amount of benzoyl peroxide. The reaction was conducted at room temperature under visible light. The direct ArC-H benzoyloxylations occur without the assistance of any directing groups and can also tolerate various functional groups that have already shown diverse reactivities in transition-metal catalysis.
Synthesis of Five-membered 2-Heteroaryl 2-Heteroaromatic Carboxylates and Attempted Cyclization to Bisheteroaryl[2,3-b:3′2′-d]pyran-2-one
Lee, Chang Kiu,Yu, Ji Sook,Kim, Sun Hee
, p. 835 - 841 (2007/10/03)
2-Heteroaryl 2-heteroaromatic carboxylates were prepared by reactions of 2-heteroaromatic carbonyl chlorides and 2(5H)-furanone, 2(5H)-thiophenone, and 1-methyl-2(5H)-pyrrolone in triethylamine. The 1H nmr spectra of the esters showed that the electronic effect of both heteroaromatic rings did not cause any sizable shift from each other except for 1-methyl-2-pyrrolyl 1-methyl-2-pyrrolecarboxylate (5c). Attempts to cyclize the esters to heteroaryl-fused pyran-2-ones were unsuccessful. The results may be explained by the most stable conformation of the esters in which two heteroatoms are anti along the C-O bond of the ester group.
