Hydroxy-, amino, and mercaptopyridines and quinolines in the reaction with phenylacetylene
作者:M. A. Andriyankov、M. V. Nikitin、A. V. Afonin
DOI:10.1007/bf00957794
日期:1989.9
Rhodium‐NHC‐Catalyzed
<i>gem</i>
‐Specific
<i>O</i>
‐Selective Hydropyridonation of Terminal Alkynes
作者:María Galiana‐Cameo、Raúl Romeo、Asier Urriolabeitia、Vincenzo Passarelli、Jesús J. Pérez‐Torrente、Victor Polo、Ricardo Castarlenas
DOI:10.1002/anie.202117006
日期:2022.5.9
AbstractThe dinuclear complex [Rh(μ‐Cl)(η2‐coe)(IPr)]2 is an efficient catalyst for the O‐selective Markovnikov‐type addition of 2‐pyridones to terminal alkynes. DFT calculations support a hydride‐free pathway entailing intramolecular oxidative protonation of a π‐alkyne by a κ1N‐hydroxypyridine ligand. Subsequent O‐nucleophilic attack on a metallacyclopropene species affords an O‐alkenyl‐2‐oxypyridine chelate rhodium intermediate as the catalyst resting state. The release of the alkenyl ether is calculated as the rate‐determining step.
ANDRIYANKOV, M. A.;NIKITIN, M. V.;AFONIN, A. V., IZV. AN CCCP. CEP. XIM.,(1989) N, S. 2098-2102
作者:ANDRIYANKOV, M. A.、NIKITIN, M. V.、AFONIN, A. V.