1-Alkynylphosphonates were obtained in good to high yields by simple heating of 1-alkynyl sulfones with trialkylphosphites.
通过简单地将1-炔基砜与亚磷酸三烷基酯一起加热,可以以高至高产率获得1-炔基膦酸酯。
Ruthenium-Catalyzed [2+2+2] Bis-Homo-Diels–Alder Cycloadditions of 1,5-Cyclooctadiene with Alkynyl Phosphonates
作者:Dina Petko、Austin Pounder、William Tam
DOI:10.1055/s-0039-1690612
日期:2019.11
Abstract The ruthenium-catalyzed [2+2+2] bis-homo-Diels–Alder cycloaddition between 1,5-cyclooctadiene and alkynyl phosphonates was investigated. Various alkynyl phosphonate moieties were found to be compatible with the cycloaddition to give the tricyclo[4.2.2.02,5]dec-7-ene tricyclic compounds in yields of 46–97%. The ruthenium-catalyzed [2+2+2] bis-homo-Diels–Alder cycloaddition between 1,5-cyclooctadiene
A method for the palladium-catalyzed synthesis of alkynylphosphonates from 1,1-dibromo-1-alkenes has been developed. In general, the best catalyst system for this transformation was found to be Pd(OAc)(2), dppf, H-phosphonate, propylene oxide, DMF, 80 degrees C. The reaction appears tolerant of a range of functional groups in both the 1,1-dibromo-1-alkene and H-phosphonate coupling partners. The synthesis