Reduced to clear: The reduction of phosphineoxides, sulfoxides, and amine N-oxides is achieved by using bis(2-chlorophenyl)borinic acid /phenylsilane. The reaction tolerates a wide range of substrates and can be performed under mild conditions with only a 2.5 mol % loading of the catalyst. NMR spectroscopy indicates that a borohydride is the key reducing species, and thus, bis(2-chlorophenyl)borinic
Reaction of 1-bromonaphthalene with PH3 in the t-BuOK/DMSO system: PCl3-free synthesis of di(1-naphthyl)phosphine and its oxide
作者:Vladimir A. Kuimov、Elena A. Matveeva、Spartak S. Khutsishvili、Tamara I. Vakul'skaya、Lidiya M. Sinegovskaya、Svetlana F. Malysheva、Nina K. Gusarova、Boris A. Trofimov
DOI:10.1016/j.tet.2017.06.036
日期:2017.8
together with hydrogen from redphosphorus and aqueous KOH, reacts with 1-bromonaphthalene in the t-BuOK/DMSO system under mild conditions (70 °C, atmospheric pressure) to give di(1-naphthyl)phosphine, which is easily oxidized in the presence of air to afford di(1-naphthyl)phosphine oxide in 45% preparative yield. Tri(1-naphthyl)phosphine and naphthalene are also formed in the reaction in 23 and 27% yield
PROCESS FOR THE PREPARATION OF UNSATURATED CARBOXYLIC ACIDS BY CARBONYLATION OF ALLYL ALCOHOLS AND THEIR ACYLATION PRODUCTS
申请人:BASF SE
公开号:US20200055834A1
公开(公告)日:2020-02-20
The present invention relates to a process for carbonylating allyl alcohols at low temperature, low pressure and/or low catalyst loading. In an alternative embodiment, an acylation product of the allyl alcohol is used for the carbonylation. The present invention likewise relates to the preparation of conversion products of these carbonylation products and specifically of (−)-ambrox.
Nickel-catalyzed manipulation of tertiary phosphines via highly selective C–P bond cleavage
作者:Jian Cao、Xian Huang、Luling Wu
DOI:10.1039/c3cc43640c
日期:——
A catalytic cycle involving oxidative addition of nickel(0) with a carbonâcarbon single bond in the three-membered ring of diarylmethylenecyclopropa[b]naphthalenes, highly selective cleavage of the CâP bond, and migration of the aryl group of phosphine consequently provides a new type of bulky phosphine in excellent yields.
[EN] PREPARATION OF AROMATIC CARBOXYAMIDES BY A PALLADIUM-CATALYZED CARBONYLATION REACTION<br/>[FR] PRÉPARATION DE CARBOXYAMIDES AROMATIQUES PAR UNE RÉACTION DE CARBONYLATION CATALYSÉE AU PALLADIUM
申请人:BASF SE
公开号:WO2021219424A1
公开(公告)日:2021-11-04
The present invention relates to a process for the preparation of aromatic carboxyamides of formula I, which can be obtained by a palladium-catalyzed carbonylation reaction of aromatic chlorides of formula II, amines of formula III and carbon monoxide in the presence of 1,5,7-triazabi-cyclo[4.4.0]dec-5-ene. The invention further relates to a process for the preparation of aryl-5-trifluoromethyl-1,2,4-oxadiazoles, which are known for controlling phytopathogenic fungi.