01393nas a2200157   4500008004100000245019300041210007000234260000800304490000900312520068600321100002301007700002301030700001601053700002501069856014101094       2021                        eng d00aConvenient and mild protocol for preparation of α –trimethylsilyloxyphosphonates using sulfamic acid and their oxidation to α – ketophosphonates in the presence of N-bromosuccinimide0 aConvenient and mild protocol for preparation of α trimethylsilyl  cSEP0 v20213 aA convenient and mild protocol was developed for the trimethylsilylation of α-hydroxyphosphonates using hexamethyldisilazane as the silylating agent in the presence of sulfamic acid (SA) as a heterogeneous solid acid catalyst in dichloromethane as the reaction medium. The utility of SA as the catalyst for deprotection of α-trimethylsilyloxyphosphonates to parent α-hydroxyphosphonates by making a switch to a protic solvent such as methanol was also demonstrated. Furthermore, the oxidation of α–trimethylsilyloxyphosphonates to corresponding α–ketophosphonates was achieved in excellent yields employing N-bromosuccinimide in the presence of catalytic quantity of AIBN.1 aMitragotri, Satish1 aKulkarni, Makarand1 aDesai, Uday1 aWadagaonkar, Prakash  uhttps://library.ncl.res.in/content/convenient-and-mild-protocol-preparation-%CE%B1-%E2%80%93trimethylsilyloxyphosphonates-using-sulfamic