Palladium-Catalyzed Aerobic Anti-Markovnikov Oxidation of Aliphatic Alkenes to Terminal Acetals
作者:Saki Komori、Yoshiko Yamaguchi、Yasutaka Kataoka、Yasuyuki Ura
DOI:10.1021/acs.joc.8b02919
日期:2019.3.15
Terminal acetals were selectively synthesized from various unbiased aliphatic terminal alkenes and 1,2-, 1,3-, or 1,4-diols using a PdCl2(MeCN)2/CuCl catalyst system in the presence of p-toluquinone under 1 atm of O2 and mild reaction conditions. The slow addition of terminal alkenes suppressed the isomerization to internal alkenes successfully. Electron-deficient cyclic alkenes, such as p-toluquinone
Thirty tertiary propargylic carbinols have been prepared by condensing propargyl bromide with ketones. Some of them showed better hypnotic activity than 3-methylpentyn-3-01. The best compound of the series was 1-chloro-2-chloromethylpent-4-yn-2-01 which proved to be a very effective hypnotic with a favourable therapeutic index.
theophylline and the corresponding unsubstituted xanthines, 3-propylxanthine and 1-methyl-3-propylxanthine. When compounds were intraduodenally administered to the guinea pig, 1-(2'-ethoxyethyl)-, 1-(3'-methoxypropyl)-, 1-(3'-butenyl)-, and 1-[(dimethylamino)-ethyl]-3-propylxanthines, 1-methyl-7-(2'-oxopropyl)-3-propylxanthine, and denbufylline (1,3-di-n-butyl-7-(2'-oxopropyl)xanthine) effectively inhibited
Reaction of halogens with some α,β-unsaturated aldehydes and ketones
作者:Victor L. Heasley、Dale F. Shellhamer、Tom L. Carter、Daphne E. Gipe、Robert K. Gipe、Richard C. Green、John Hordeen、Terry D. Rempel、Dan H. Spaite、Gene E. Heasley
DOI:10.1016/s0040-4039(01)92934-x
日期:1981.1
Mechanisms are proposed to account for evidence indicating that some simple α,β-unsaturated aldehydes and ketones do not react with halogens by the expected attack on the CC bond.
提出了机制以解释表明某些简单的α,β-不饱和醛和酮不会因预期的对CC键的攻击而与卤素反应的证据。
α-Hydroxylation of 1,3-Dicarbonyl Compounds Catalyzed by Polymer-incarcerated Gold Nanoclusters with Molecular Oxygen
作者:Hiroyuki Miyamura、Shū Kobayashi
DOI:10.1246/cl.2012.976
日期:2012.9.5
α-Hydroxylation of 1,3-dicarbonyl compounds was successfully catalyzed by carbon-stabilized polymer-incarcerated gold nanoclusters (PI/CB-Au). The reaction proceeded under mild conditions using mol...