29194-05-6Relevant articles and documents
Tb2(WO4)3@N-GQDs-FA as an efficient nanocatalyst for the efficient synthesis of β-aminoalcohols in aqueous solution
Azizi, Sajjad,Darroudi, Mahdieh,Soleymani, Jafar,Shadjou, Nasrin
, (2021/02/12)
In the current study, Tb2(WO4)3@N-(GQDs) modified with folic acid (FA) was synthesized during the chemical reaction of terbium (III) tungstate nanoparticles with nitrogen doped graphene quantum dots (N-GQDs) and introduced
Preparation of enantiopure chiral amino- [D1]methyllithium compounds and determination of their micro- and macroscopic configurational stabilities
Kapeller, Dagmar C.,Hammerschmidt, Friedrich
experimental part, p. 5729 - 5739 (2009/12/29)
Chiral amino-[D1]methyllithiums have been tested with regard to their microscopic and macroscopic configurational stabilities. The N-Boc-N-diethoxyphosphinyl-sub-stituted analogue immediately rearranged, showing complete retention of configuration at up t
Ytterbium Triflate and High Pressure-mediated Ring Opening of Epoxides with Amines
Meguro, Masaki,Asao, Naoki,Yamamoto, Yoshinori
, p. 2597 - 2602 (2007/10/02)
Ring opening of epoxides with amines in THF takes place very readily in the presence of catalytic amounts of ytterbium triflate to give the corresponding β-amino alcohols in good to high yields.With tri- and tetra-substituted epoxides, the use of an excess (2 - 3 equiv.) of the amine is needed.The Yb(OTf)3-catalysed reaction of epoxides with amines in CH2Cl2 is quite complex; the yield of amino alcohols is generally lower and depends upon the addition order of the catalyst, amine and epoxide.The ring opening is accomplished also under high pressures in the absence of Yb(OTf)3.Ring opening with a combination of Yb(OTf)3 in CH2Cl2 and high pressure is more effective than the use, independently, of either Yb(OTf)3 or the high-pressure method.Oxetanes and β-lactones undergo ring opening in the presence of Yb(OTf)3.