[(PPh<sub>3</sub>)<sub>2</sub>NiCl<sub>2</sub>]-Catalyzed C–N Bond Formation Reaction via Borrowing Hydrogen Strategy: Access to Diverse Secondary Amines and Quinolines
作者:S. N. R. Donthireddy、Vipin K. Pandey、Arnab Rit
DOI:10.1021/acs.joc.1c00510
日期:2021.5.7
mono-N-alkylation of (hetero)aromatic amines, employing alcohols to deliver diverse secondaryamines, including the drug intermediates chloropyramine (5b) and mepyramine (5c), in excellent yields (up to 97%) via the borrowing hydrogen strategy. This method shows a superior activity (TON up to 10000) with a broad substrate scope at a low catalyst loading of 1 mol % and a short reaction time. Further, this strategy
Colourimetric Carboxylate Anion Sensors Derived from Viologen-Based Receptors
作者:Adam N. Swinburne、Martin J. Paterson、Kathrin H. Fischer、Sara Jane Dickson、Emma V. B. Wallace、Warwick J. Belcher、Andrew Beeby、Jonathan W. Steed
DOI:10.1002/chem.200902609
日期:2010.2.1
viologen‐based anionreceptors showing a colourimetric response to carboxylates, such as acetate, have been synthesised. Alteration of the anion binding sites allows for binding site competition within a receptor. This results in a delayed colourimetric response for urea derivatives compared with pyridinium systems because the anions are initially bound to the periphery of the receptor, away from the viologen