Rh(III)‐Catalyzed Intramolecular Oxidative Annulation of Propargyl Amino Phenyl Benzamides to Access Pyrido/ Isoquinolino Quinoxalinones
作者:Gurram Ravi Kumar、Ravi Kumar、Manda Rajesh、B. Sridhar、Maddi Sridhar Reddy
DOI:10.1002/adsc.201900772
日期:2019.10.22
A rhodium catalyzed copper mediated double oxidativeannulation of propargylamino phenylbenzamides is developed. A quick assembly of tri, tetra and penta cyclic pyrido/isoquinolo‐quinoxilines are thus achieved from readily available linear substrates. The reaction is shown to be very general by accommodating a large variety of substrates in the transformation. A mechanism through an amide directed
Cyclocondensation of N-prop-2-ynyl-and N-pentadiynyl-o-phenylenediamines with phenyl isothiocyanate
作者:R. V. Novikov、M. E. Borovitov、I. A. Balova
DOI:10.1007/s10593-008-0068-7
日期:2008.4
Cyclocondensation of N-prop-2-ynyl-o-phenylenediamine with phenyl isothiocyanate leads to the formation of 1-(3-arylprop-2-ynyl)-2,3-dihydro-1H-benzimidazole-2-thiones. In the reactions of diacetylene derivatives - N-penta-2,4-diynyl-o-phenylenediamine - with phenyl isothiocyanate the formation of two heterocyclic nuclei occurs simultaneously to form [1,3]thiazolidino[3,2-a]benzimidazoles.