P4VPy–CuO nanoparticles were synthesized using ultrasound irradiations. Relevant properties of the synthesized nanoparticles were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and Fourier transform infrared spectroscopy. After identification, the prepared reagent was used for the promotion of different types of protection reactions of alcohols, phenols and amines. Easy workup, short reaction times, excellent yields, relatively low cost and reusability of the catalyst are the striking features of the reported methods.
ethers and the [4+2] cycloadducts between the silene and diene, which confirms the presence of 2 and that it is unreactive towards alcohols. The observed silylethers are substitution adducts where the amide group of the silylamide is replaced by an alkoxy group, and the reaction time is reflected in the steric bulk of the alcohol. Indeed, the formation of silylethers from the reaction of alcohols with
MICROWAVE ACCELERATED TETRAHYDROPYRANYLATION AND DETETRAHYDROPYRANYLATION OF ALCOHOLS, PHENOLS, AND THIOLS CATALYZED BY HYDRATED ZIRCONIA
作者:Anil S. Gajare、Dhananjay P. Sabde、Murlidhar S. Shingare、Radhika D. Wakharkar
DOI:10.1081/scc-120004145
日期:2002.1
A solvent free and expeditious method for tetrahydropyranylation and detetrahydropyranylation of alcohols, phenols and thiols is described using hydrated zirconia and 3,4-dihydro-2H-pyran (DHP). A comparison of this microwave-accelerated reaction with conventional heating condition is also presented.
ITO YOSHIHIKO; HIRAO TOSHIKAZU; SAEGUSA TAKEO, J. ORG. CHEM. 1978, 43, NO 5, 1011-1013