An efficient preparation of β-ketophosphine oxides from alkynylphosphine oxides with benzaldehyde oxime as a hydroxide source
作者:Lu-Lu Chen、Jing-Wen Zhang、Wan-Wan Yang、Pei Chen、Dan-Yun Chen、Yan-Bo Wang
DOI:10.1039/c9ob00251k
日期:——
An effective and facile transition-metal-free method has been developed for the synthesis of β-ketophosphine oxides from alkynylphosphine oxides with benzaldehydeoxime as a hydroxide surrogate. The current methodology provides simple access to various β-ketophosphine oxides in moderate to excellent yields with a broad substrate scope.
A highly efficient palladium(II)‐catalyzedhydration of a wide range of alkynylphosphonates to the corresponding β‐ketophosphonates has been developed to give high yields at 80 °C in 1, 4‐dioxane, with no acidic or alkaline cocatalysts required. The described catalytic system should provide an efficient alternative to highly toxic mercury‐catalyzed methodologies and be useful in synthetic programs
Cuproussiloxane as two self-assemblies, Cu<sub>20</sub>O<sub>20</sub>Si<sub>10</sub>Me<sub>10</sub>R<sub>10</sub> and Cu<sub>24</sub>O<sub>24</sub>Si<sub>12</sub>Me<sub>12</sub>R<sub>12</sub>, with catalytic property
A cuproussiloxane is prepared and utilized to catalyze the aerobic C–P coupling of terminal alkynes with H-phosphonates to alkynylphosphonates.
制备并利用一种亚铜硅氧烷催化末端炔烃与 H-膦酸盐的有氧 C-P 偶联反应,生成炔膦酸盐。
Copper-Mediated Oxidative Decarboxylative Coupling of Arylpropiolic Acids with Dialkyl H-Phosphonates in Water
作者:Xiang Li、Fan Yang、Yangjie Wu、Yusheng Wu
DOI:10.1021/ol4037242
日期:2014.2.7
An efficient, mild, and generally applicable protocol for copper-mediated oxidativedecarboxylativecoupling of arylpropiolicacids with dialkyl H-phosphonates in water has been developed. Note that the reaction could proceed smoothly under air at relatively low temperature (60 °C), and the addition of isopropanol could successfully suppress the decomposition of dialkyl H-phosphonates in water.
Gold(I)-Catalyzed Hydration of Alkynylphosphonates: Efficient Access to β-Ketophosphonates
作者:Longyong Xie、Rui Yuan、Ruijia Wang、Zhihong Peng、Jiannan Xiang、Weimin He
DOI:10.1002/ejoc.201400066
日期:2014.5
A general, efficient, and highly regioselective protocol with the use of a gold(I) complex catalytic system for the transformation of alkynylphosphonates into the corresponding β-ketophosphonates has been successfully developed. This method produces a variety of β-ketophosphonates with the advantages of mild reaction conditions, high functional-group tolerance, and excellent yields.