catalysis strategy for the direct trifluoromethylation of coumarins with inexpensive sodium triflinate (Langlois reagent, CF3SO2Na) as the CF3 source under xenon lamp irradiation is described. The reaction proceeds under ambient conditions and affords the corresponding products in moderate yields. The acetone can be used as low-cost radical initiator to generate CF3 radicals from sodium triflinate efficiently
描述了一种简单,无金属和氧化剂的光催化策略,用于在氙气灯照射下,使用廉价的三氟甲酸钠(Langlois试剂,CF 3 SO 2 Na)作为CF 3源直接对香豆素进行三氟甲基化。反应在环境条件下进行,并以中等收率得到相应的产物。丙酮可用作低成本的自由基引发剂,可从三氟甲磺酸钠高效生成CF 3自由基。
Recyclable alkylated Ru(bpy)32+ complex as a visible-light photoredox catalyst for perfluoroalkylation
A recyclable Ruthenium tris [4,4′-bis (dinonylmethyl)-2,2′-bipyridine] (Ru[(DNM)2bpy]32+) photocatalyst (PC) was synthesized. Hexane-phase-selective solubility allowed its simple and efficient separation from reaction products via solvent extraction. The excellent catalytic activity and recoverability were demonstrated in batch and flow perfluoroalkylation reactions of coumarin under visible-light
[EN] OPTICALLY ACTIVE DEVICES<br/>[FR] DISPOSITIFS OPTIQUEMENT ACTIFS
申请人:[en]AMO IRELAND
公开号:WO2022161895A1
公开(公告)日:2022-08-04
The present invention relates to novel ophthalmic devices comprising polymerized compounds comprising a photoactive chromophore, special polymerized compounds, and special monomer compounds being particularly suitable for compositions and ophthalmic devices. The present invention is also directed to a process of changing the optical properties of said ophthalmic device or a precursor article for an ophthalmic device.