Catalytic hydrogenation of nitriles to produce capsaicinoid derivatives and amine compounds, and methods for purifying and obtaining the polymorphs thereof
Continuous Flow Sodiation of Substituted Acrylonitriles, Alkenyl Sulfides and Acrylates
作者:Johannes H. Harenberg、Niels Weidmann、Konstantin Karaghiosoff、Paul Knochel
DOI:10.1002/anie.202012085
日期:2021.1.11
The sodiation of substituted acrylonitriles and alkenyl sulfides in a continuous flow set‐up using NaDA (sodium diisopropylamide) in EtNMe2 or NaTMP (sodium 2,2,6,6‐tetramethylpiperidide)⋅TMEDA in n‐hexane provides sodiated acrylonitriles and alkenyl sulfides, which are subsequently trapped in batch with various electrophiles such as aldehydes, ketones, disulfides and allylic bromides affording functionalized
Process for the preparation of alkenylbenzenecarboxylic acid derivatives
申请人:Ciba-Geigy Corporation
公开号:US04335054A1
公开(公告)日:1982-06-15
Compounds of the formula I ##STR1## in which p, m, Z, R, R' and Y are as defined in claim 1, can be obtained in a simple and economical manner by a novel process which comprises reacting a halide of the formula ##STR2## with the corresponding acrylic acid derivative, in the presence of a base and of certain palladium catalysts, such as palladium acetate. The compounds (I), and functional derivatives prepared therefrom, are useful for the preparation of photocrosslinkable polymers, which can in particular be employed as (so-called) photoresists.
Ligand-accelerated non-directed C–H functionalization of arenes
作者:Peng Wang、Pritha Verma、Guoqin Xia、Jun Shi、Jennifer X. Qiao、Shiwei Tao、Peter T. W. Cheng、Michael A. Poss、Marcus E. Farmer、Kap-Sun Yeung、Jin-Quan Yu
DOI:10.1038/nature24632
日期:2017.11
challenges associated with the lack of sufficiently active palladium catalysts. Currently used palladium catalysts are reactive only with electron-rich arenes, unless an excess of arene is used, which limits synthetic applications. Here we report a 2-pyridone ligand that binds to palladium and accelerates non-directed C–H functionalization with arene as the limiting reagent. This protocol is compatible with
Catalytic hydrogenation of nitriles to produce capsaicinoid derivatives and amine compounds, and methods for purifying and obtaining the polymorphs thereof
申请人:Meckler Harold
公开号:US20060047171A1
公开(公告)日:2006-03-02
Processes for preparing an amine compound by catalytically hydrogenating a precursor nitrile compound. In a particular aspect, the present hydrogenation process occurs in a dipolar organic solvent in the presence of a palladium/carbon catalyst and a strong anhydrous protic acid. In a further aspect, the preferred embodiment relates to a process for deprotecting a compound to produce an amine compound. In yet a further aspect, the preferred embodiment relates to amine products produced by the present processes. These amine products may be used for a variety of purposes.