Kinetic resolution of ketone cyanohydrin acetates with a microbial enzyme
作者:Hiromichi Ohta、Yoichi Kimura、Yasushi Sugano
DOI:10.1016/s0040-4039(00)88486-5
日期:1988.1
A Highly Efficient and Recyclable Silica-Based Scandium(III) Interphase Catalyst for Cyanosilylation of Carbonyl Compounds
作者:Babak Karimi、Leila Ma'Mani
DOI:10.1021/ol0482083
日期:2004.12.1
A new silica-based scandium(III) interphase catalyst 2 efficiently catalyzes the cyanosilylation of a variety of aldehydes and ketones. The catalyst shows high thermal stability (up to 300degreesC) and also is stable in both organic and polar solvents. It also could be recovered and reused for at least 10 reaction cycles without considerable loss of reactivity.
A one-pot esterification of chiral O-trimethylsilyl-cyanohydrins with retention of stereochemistry
作者:Stephanie Norsikian、Ian Holmes、Franz Lagasse、Henri B Kagan
DOI:10.1016/s0040-4039(02)01200-5
日期:2002.8
Enantionicrically enriched O-TMS cyanohydrins have been transformed directly into O-acyl-cyanohydrins using various anhydrides or acid chlorides in the presence of catalytic amounts of scandium(III) triflate. The reaction occurs with full retention of stereochemistry and allows the convenient measurement of enantiomeric excesses by chiral HPLC. (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of 4-Amino-2(5<i>H</i>)-furanones through Intra- and Intermolecular Nitrile Addition of Ester Enolates. Construction of Carbon Framework of an Antitumor Antibiotic Basidalin
ester group, deprotection, olefin isomerization and lactonization all in a single operation. The other is base-induced ringclosure of α-acyloxy nitriles. The two methods are applied to construction of the carbonframework of an antitumor antibiotic basidalin.
Fe(Cp)2PF6: An efficient catalyst for cyanosilylation of carbonyl compounds under solvent free condition
作者:Noor-ul H. Khan、Santosh Agrawal、Rukhsana I. Kureshy、Sayed H.R. Abdi、Surendra Singh、Raksh V. Jasra
DOI:10.1016/j.jorganchem.2007.07.011
日期:2007.9
An efficient method for the addition of trimethylsilyl cyanide (TMSCN) to various aldehydes and ketones has been described using Fe(Cp)2PF6 (2.5 mol%) as a catalyst under solvent free condition. Excellent yields of trimethylsilylether of cyanohydrin up to (94%) was achieved within 10 min.