The Synthesis of Phosphaisocoumarins by Cu(I)-Catalyzed Intramolecular Cyclization of <i>o</i>-Ethynylphenylphosphonic Acid Monoesters
作者:Ai-Yun Peng、Yi-Xiang Ding
DOI:10.1021/ja038627f
日期:2003.12.1
Cu(I)-catalyzed intramolecular cyclization of o-ethynylphenylphosphonic acid monoethyl esters was examined, and a new class of six-membered phosphorus heterocycles was formed with high regioselectivity and good yields. The present reaction is the first example of intramolecular addition of P-OH to alkynes, which provides a convenient way to synthesize novel phosphorus heterocycles having potential
Synthesis of Phosphaisocoumarins via Iodocyclization
作者:Ai-Yun Peng、Yi-Xiang Ding
DOI:10.1021/ol0499506
日期:2004.4.1
4-lodophosphaisocoumarins can be prepared in good yield and with high regioselectivity under mild conditions by the reaction of o-(1-alkynyl)phenylphosphonates with I-2 or ICI. The present reaction represents the first example of a phosphonate iodocyclization onto a C-C triple bond. The resulting iodides can be further elaborated using palladium-catalyzed coupling reactions.
A convenient and applicable route to synthesize 2-(1-alkynyl)phenylphosphonates