L-aminodicarboxylic acid amides of alkoxyalkylamines
申请人:General Foods Corporation
公开号:US04603011A1
公开(公告)日:1986-07-29
The present invention is directed to new sweeteners of the formula: ##STR1## wherein, A is H, alkyl containing 1-3 carbon atoms, hydroxyalkyl containing 1-3 carbon atoms, alkoxymethyl wherein the alkoxy group contains 1-3 carbon atoms, or CO.sub.2 R in which R is alkyl containing 1-3 carbon atoms; A' is H or CH.sub.3 ; A and A' when taken together with the carbon atom to which they are attached form a cycloalkyl containing 3-4 carbon atoms; R.sub.1 and R.sub.2 are each a branched-chain alkyl containing 3-5 carbon atoms; and m=0 or 1; and food-acceptable salts thereof.
Achieving regio- and stereo-control in the fluorination of aziridines under acidic conditions
作者:Otome E. Okoromoba、Zhou Li、Nicole Robertson、Mark S. Mashuta、Uenifer R. Couto、Cláudio F. Tormena、Bo Xu、Gerald B. Hammond
DOI:10.1039/c6cc07855a
日期:——
We developed an efficient fluorination protocol that converts easily accessible aziridines into [small beta]-fluoroamines, which are important motifs in biologically active molecules. In contrast with traditional fluorination approaches, DMPU-HF has shown...
CATALYSTS, METHODS OF MAKING, AND METHODS OF HYDROFLUORINATION
申请人:UNIVERSITY OF LOUISVILLE RESEARCH FOUNDATION, INC.
公开号:US20210275998A1
公开(公告)日:2021-09-09
Some embodiments of the invention include inventive catalysts (e.g., catalysts of Formula (I)). Other embodiments include compositions comprising the inventive catalysts. Some embodiments include methods of using the inventive catalysts (e.g., in hydrofluorination of an organic compound). Further embodiments include methods for making the inventive catalysts. Additional embodiments of the invention are also discussed herein.
Regioselective ring opening of 2-methylaziridine derivatives with 18F- and 19F-fluoride
作者:Erik M. van Oosten、Michael Gerken、Paul Hazendonk、Roxanne Shank、Sylvain Houle、Alan A. Wilson、Neil Vasdev
DOI:10.1016/j.tetlet.2011.05.139
日期:2011.8
Regioselectivity of the nucleophilic ringopening of N-benzoyl (Bz) and N-benzyloxycarbonyl (Cbz) activated 2-methylaziridines with anhydrous tetramethylammonium fluoride, anhydrous hydrogenfluoride, and 19F or [18F]-labelled potassium cryptand fluoride ([K222][18/19F]) were investigated. Whereas all reactions with rigorously anhydrous N(CH3)4F did not ring-open the aziridines, reactions with anhydrous
Process Development of a Scaleable Route to (2<i>R</i>)-[3-(2-Aminopropyl)-1<i>H</i>-indol-7-yloxy]-<i>N,N</i>-diethylacetamide: A Key Intermediate for AJ-9677, a Potent and Selective Human and Rat β<sub>3</sub>-Adrenergic Receptor Agonist
attention on the nucleophilic substitution reaction of the indole Grignard reagent 12 with acid chlorides. At the outset of our synthesis, reaction of 12 with acetyl chloride as a simple acid chloride was examined. Treatment of 12generated from4 and methylmagnesium bromide with acetyl chloride in CH2Cl2 along with a small amount of Et 2O needed for methylmagnesium bromide under ice-cooling or at room temperature