Magnesium triflate [Mg(OTf)2] a highly stable, non-hygroscopic and a recyclable catalyst for the high yielding preparation of diethyl α-trimethylsilyloxyphosphonates from diethyl α-hydroxyphosphonates by HMDS under solventless conditions
and convenient procedure for the easy conversion of various α-hydroxyphosphonates to α-trimethylsilyloxyphosphonates under mild conditions with HMDS in the presence of a catalytic amount of magnesium triflate as a highly stable and a non-hygroscopic recyclable catalyst in neat conditions is described. In order to show the general applicability of this method, we have also applied this procedure successfully
Aluminium Triflate [Al(OTf)<sub>3</sub>] as a Recyclable Catalyst for the Conversion of α-Hydroxyphosphonates, Alcohols and Phenols to Their Corresponding O-Silylated Products with Hexamethyldisilazane (HMDS)
Al(OTf)3 as a recyclable catalyst conducts the efficient conversion of various types of α-hydroxyphosphonates to their corresponding α-trimethysilyloxyphosphonates with HMDS in the absence of solvent at room temperature. The general applicability of the catalyst under solvent-free conditions is demonstrated by applying it for the successful silylation of alcohols and phenols with HMDS in high yields.
Preparation of α-ketophosphonates by oxidation of α-hydroxyphosphonates with neutral alumina supported potassium permanganate (NASPP) under solvent-free conditions and potassium permanganate in dry benzene
作者:Habib Firouzabadi、Nasser Iranpoor、Sara Sobhani
DOI:10.1016/s0040-4039(01)02146-3
日期:2002.1
Various types of α-hydroxyphosphonates were converted to α-ketophosphonates in high yields by potassiumpermanganate in dry benzene or by neutral alumina supported potassiumpermanganate (NASPP) under solvent-free conditions.
High yield preparation of α-ketophosphonates by oxidation of α-hydroxyphosphonates with zinc dichromate trihydrate (ZnCr2O7·3H2O) under solvent-free conditions
Various types of α-hydroxyphosphonates were converted to α-ketophosphonates by zinc dichromate trihydrate in high yields and rates under solvent-free conditions.
通过三水合重铬酸锌在无溶剂条件下以高收率和高产率将各种类型的α-羟基膦酸酯转化为α-酮膦酸酯。
Copper Triflate as a Useful Catalyst for the High-Yielding Preparation of α-Acetyloxyphosphonates under Solvent-Free Conditions
A high-yielding and convenient procedure for the efficient conversion of α-hydroxyphosphonates to α-acetyloxyphosphonates using acetic anhydride in the presence of catalytic amounts of copper triflate is described.