Synthesis of Homopropargyl Cycloalkanols by Pd-Catalyzed Samarium Diiodide-Promoted Intramolecular Coupling of Alkynyl Esters with Aldehydes and Ketones
作者:Jose M. Aurrecoechea、Roberto Fananas-San Anton
DOI:10.1021/jo00083a003
日期:1994.2
Treatment of 1-(4-oxoalkyl)-2-alkynyl esters with SmI2/Pd-0 results in intramolecular cyclization to afford homopropargyl cycloalkanols. The same products are also obtained starting from isomeric gamma-alkynyl-substituted lactol esters.
SmI<sub>2</sub>/Pd(0)-Mediated Intramolecular Coupling between Propargylic Esters and Tethered Aldehydes or Ketones
作者:José M. Aurrecoechea、Roberto Fañanás、Mónica Arrate、José M. Gorgojo、Natalia Aurrekoetxea
DOI:10.1021/jo9819133
日期:1999.3.1
chelating trivalent samarium and facilitating retroaldol-aldol-type equilibria in the product. In this latter case, the strategic combination of chemoselective carbonyl addition and SmI(2)/Pd(0)-promoted cyclization provides ready and convenient stereocontrolled access to functionalized cyclopentanols from unprotected 1,5-dicarbonyl starting materials. The analogous formation of cyclohexanols is limited by