A process for preparing 8-substituted oxy-5-((R)-2-halo-l-hydroxy-ethyl)-(1 H)-quinolin-2-ones or acceptable solvates thereof. The process involves reacting a 5-(α-haloacetyl)-8-substituted oxy-(1H)-quinolin-2-one with a reducing agent in the presence of a chiral agent and a base to form a 8-(substituted oxy)-5-((R)-2-halo-l-hydroxy-ethyl)-(1H)-quinolin-2-one, said chiral agent having a formula (I) or (II), wherein M, L, X, R1, R2 and R3 have the meanings as indicated in the specification.
Development of 1-Hydroxy-2(1<i>H</i>)-quinolone-Based Photoacid Generators and Photoresponsive Polymer Surfaces
作者:Mohammed Ikbal、Rakesh Banerjee、Sanghamitra Atta、Avijit Jana、Dibakar Dhara、Anakuthil Anoop、N. D. Pradeep Singh
DOI:10.1002/chem.201104065
日期:2012.9.17
A new class of carboxylate and sulfonate esters of 1‐hydroxy‐2(1H)‐quinolone has been demonstrated as nonionic photoacid generators (PAGs). Irradiation of carboxylates and sulfonates of 1‐hydroxy‐2(1H)‐quinolone by UV light (λ≥310 nm) resulted in homolysis of weak NO bond leading to efficient generation of carboxylic and sulfonic acids, respectively. The mechanism for the homolytic NO bond cleavage