An efficient Ru(II)-catalyzed intermolecularamidation of weakly coordinating ketones with sulfonyl azides via C-H bond activation is described. The reaction proceeds with high functional group tolerance, providing a novel approach to practical ketone-directed intermolecular C-N bond formation in the absence of an additional oxidant.
Copper-catalyzed decarboxylative cyclization <i>via</i> tandem C–P and C–N bond formation: access to 2-phosphorylmethyl indoles
作者:Bao-Cheng Wang、Ya-Ni Wang、Mao-Mao Zhang、Wen-Jing Xiao、Liang-Qiu Lu
DOI:10.1039/c8cc00739j
日期:——
A novel copper-catalyzed decarboxylative cyclization of ethynyl benzoxazinanones with P(O)H compounds has been developed. This protocol leads to a series of 2-phosphorylmethyl indoles with high efficiency and selectivity (up to 99% yield) through tandem C–P/C–N bond formation under mild conditions.
Ru(ii)-catalyzed intermolecular ortho-C–H amidation of aromatic ketones with sulfonyl azides
作者:M. Bhanuchandra、M. Ramu Yadav、Raja K. Rit、Malleswara Rao Kuram、Akhila K. Sahoo
DOI:10.1039/c3cc41915k
日期:——
Ru(II)-catalyzed intermolecular ortho-CâH amidation of weakly coordinating aromatic ketones with sulfonyl azides is reported. The developed reaction protocol can be extended to various substituted aromatic ketones to afford a wide range of desired CâN bond formation products in good yields.
Ruthenium-Catalyzed Direct CH Amidation of Arenes Including Weakly Coordinating Aromatic Ketones
作者:Jiyu Kim、Jinwoo Kim、Sukbok Chang
DOI:10.1002/chem.201301025
日期:2013.6.3
CH activation: The ruthenium‐catalyzed direct sp2 CHamidation of arenes by using sulfonyl azides as the amino source is presented (see scheme). A wide range of substrates were readily amidated including arenes bearing weakly coordinating groups. Synthetic utility of the thus obtained products was demonstrated in the preparation of biologically active heterocycles.