Successively Recycle Waste as Catalyst: A One-Pot Wittig/1,4-Reduction/Paal–Knorr Sequence for Modular Synthesis of Substituted Furans
摘要:
A one-pot tandem Wittig/conjugate reduction/PaalKnorr reaction is reported for the synthesis of di- or trisubstituted furans. This novel sequence first demonstrates the possibility of successively recycling waste from upstream steps to catalyze downstream reactions.
Merging visible-light photoredox and micellar catalysis: arylation reactions with anilines nitrosated <i>in situ</i>
作者:Mei-jie Bu、Guo-ping Lu、Jianzhong Jiang、Chun Cai
DOI:10.1039/c8cy01221k
日期:——
utilized as the photocatalyst, and Triton X-100 was employed as the surfactant; both are inexpensive and commercially available. This clean and energy-saving catalytic system enables photocatalytic reactions of the diazonium ion generated in situ to proceed smoothly in water without any co-solvents or additives at room temperature.
[EN] PROCESS FOR THE SYNTHESIS OF ARYLDIAZONIUM SALTS USING NITROGEN OXIDES IN OXYGEN-CONTAINING GAS STREAMS, ESPECIALLY FROM INDUSTRIAL WASTE GASES<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE SELS D'ARYLDIAZONIUM AU MOYEN D'OXYDES D'AZOTE DANS DES FLUX GAZEUX CONTENANT DE L'OXYGÈNE, PROVENANT EN PARTICULIER D'EFFLUENTS GAZEUX INDUSTRIELS
The present invention relates to a process for the synthesis of aryldiazonium salts using nitrogen oxides in oxygen-containing gas streams, especially from industrial waste gases.
本发明涉及一种利用含氧气体流中的氮氧化物合成芳基重氮盐的方法,特别是从工业废气中进行合成。
Use of Strobilurin Type Compounds for Combating Phytopathogenic Fungi Resistant to QO Inhibitors
申请人:BASF SE
公开号:US20140323305A1
公开(公告)日:2014-10-30
The present invention relates to the use of strobilurine type compounds of formula I and the N-oxides and the salts thereof for combating phytopathogenic fungi containing a mutation in the mitochondrial cytochrome b gene conferring resistance to Qo inhibitors, and to methods for combating such fungi. The invention also relates to novel compounds, processes for preparing these compounds, to compositions comprising at least one such compound, to plant health applications, and to seeds coated with at least one such compound.
Direct (Hetero)arylation of Heteroarenes Catalyzed by Unsymmetrical Pd-PEPPSI-NHC Complexes under Mild Conditions
作者:A-Xiang Song、Xiao-Xiao Zeng、Bei-Bei Ma、Chang Xu、Feng-Shou Liu
DOI:10.1021/acs.organomet.0c00494
日期:2020.10.12
Pd-PEPPSI-type NHC complexes (PEPPSI, pyridine-enhanced precatalyst preparation, stabilization, and initiation; NHC, N-heterocyclic carbene) were designed and synthesized to catalyze the directarylation of heteroarenes with (hetero)aryl bromides. The results demonstrated that the utilization of this “unsymmetrical” strategy led to much higher efficiency in comparison to the commonly used C2-symmetric
The rhodium catalysed 1,4-carbonylative addition of arylboronic acids to methyl vinylketone under carbon monoxide pressure was studied. High yields of 1,4-diketones were obtained using a catalytic system formed from Rh(COD)2BF4 (COD=1,5-cyclooctadiene) and triphenylphosphine even at very low catalyst loading (0.02 mol %). A short synthetic procedure combining this carbonylation reaction with a subsequent