@article {47787,
	title = {Convenient and mild protocol for preparation of α {\textendash}trimethylsilyloxyphosphonates using sulfamic acid and their oxidation to α {\textendash} ketophosphonates in the presence of N-bromosuccinimide},
	journal = {Arkivoc},
	volume = {2021},
	year = {2021},
	month = {SEP},
	type = {Article},
	abstract = {A 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{\textendash}trimethylsilyloxyphosphonates to corresponding α{\textendash}ketophosphonates was achieved in excellent yields employing N-bromosuccinimide in the presence of catalytic quantity of AIBN.},
	doi = {10.24820/ark.5550190.p011.603},
	author = {Mitragotri, Satish and Kulkarni, Makarand and Desai, Uday and Wadagaonkar, Prakash}
}
@article {47641,
	title = {Role of preparation parameters of Cu-Zn mixed oxide catalyst in solvent free glycerol carbonylation with urea},
	journal = {Journal of the Indian Chemical Society},
	volume = {98},
	year = {2021},
	month = {JUL},
	pages = {100090},
	type = {Article},
	abstract = {Solvent-free carbonylation of glycerol with urea to glycerol carbonate (GC) was achieved over heterogeneous Cu-Zn mixed oxide catalyst. Cu-Zn catalysts with different ratios of Cu:Zn were prepared using co-precipitation (CP) and oxalate gel (OG) methods. As compared to CuO-ZnO(2:1) catalyst prepared by oxalate gel (OG) method, much higher conversion of glycerol and highest selectivity towards glycerol carbonate (GC) was achieved with CuO-ZnO_CP(2:1) catalyst. Physicochemical properties of prepared catalysts were investigated by using XRD, FT-IR, BET, TPD of CO2 and NH3 and TEM techniques. The effect of stoichiometric ratio of Cu/Zn, calcination temperature of CuO-ZnO catalysts and effect of reaction parameters such as molar ratio of substrates, time and temperature on glycerol conversion to GC were critically studied. Cu/Zn of 2:1 ratio, glycerol-urea 1:1 molar ratio, 145 degrees C reaction temperatures were found to be optimized reaction conditions to achieve highest glycerol conversion of 86\% and complete selectivity towards GC. The continuous expel of NH 3 from reaction the mixture avoided formation of ammonia complex with CuO-ZnO catalyst. As a result of this, CuO-ZnO catalyst could be recycled up to three times without losing its initial activity.},
	keywords = {Co-precipitation (CP), Glycerol, Glycerol carbonate, Oxalate gel (OG)},
	issn = {0019-4522},
	doi = {10.1016/j.jics.2021.100090},
	author = {Charate, Shrinivas and Shinde, Suhas and Kondawar, Sharda and Desai, Uday and Wadgaonkar, Prakash and Rode, Chandrashekhar}
}
