A general and convenient route to oxazolyl ligands
摘要:
A diverse range of chiral and achiral oxazolyl ligands, which have many applications including catalysis and luminescent devices, are synthesized simply in three steps from readily available and inexpensive phenol and amino alcohol starting materials. The method can be applied to ligands with electron-donating/-withdrawing and sterically demanding/undemanding substituents, and can conveniently be scaled up to >25 g of product. (C) 2011 Elsevier Ltd. All rights reserved.
Aerobic C(sp<sup>2</sup>)–H Hydroxylations of 2-Aryloxazolines: Fast Access to Excited-State Intramolecular Proton Transfer (ESIPT)-Based Luminophores
作者:Dominik Göbel、Nils Clamor、Enno Lork、Boris J. Nachtsheim
DOI:10.1021/acs.orglett.9b01350
日期:2019.7.19
The direct hydroxylation of 2-aryloxazolines via a deprotonative magnesiation using TMPMgCl center dot LiCl and subsequent oxidation with molecular oxygen or air as a green oxidant is reported. This method proceeds under mild conditions at room temperature with high regioselectivity and chemoselectivity. The obtained phenols exhibit tunable luminescence properties, induced by excited-state intramolecular proton transfer. This method opens a new opportunity for the sustainable synthesis of luminescent organic molecules.