硝酸铋(III)五水合物,一种高效的环境友好型催化剂,用于在无溶剂微波条件下与芳香族,脂肪族和杂芳香族胺一起对环氧氯丙烷和氧化苯乙烯进行亲核开环,从而大大缩短了反应时间,从而提供了相应的β-氨基醇具有良好的收率和优异的选择性,并具有较高的区域选择性。获得的产物通过柱色谱法直接纯化,并通过1 H和13 C NMR,FTIR和质谱进行表征。
Stereocontrolled, Divergent, Al(lll)-Catalyzed Coupling of Chiral <i>N</i>-Aryl Epoxy Amines and CO<sub>2</sub>
作者:Yuseop Lee、Jonghoon Choi、Hyunwoo Kim
DOI:10.1021/acs.orglett.8b02186
日期:2018.8.17
achieved between N-aryl epoxy amines and CO2. By using two different cocatalysts, tetrabutylammonium iodide (TBAI) or 4-dimethylaminopyridine (DMAP) together with an Al(III) Lewis acid, cycliccarbonates or oxazolidinones were selectively produced through two distinct reaction pathways, respectively. The proposed reaction mechanism was supported by the stereochemical determination of the products. A
Continuous organocatalytic flow synthesis of 2-substituted oxazolidinones using carbon dioxide
作者:Nicola Zanda、Leijie Zhou、Esther Alza、Arjan W. Kleij、Miquel À. Pericàs
DOI:10.1039/d2gc00503d
日期:——
organocatalytic continuous flow approach to promote the efficient synthesis of a small library of pharmaceutically relevant 2-substituted oxazolidinones, including the known drug Toloxatone. A packed bed reactor containing the same batch of immobilized catalyst could be applied for the continuous synthesis of a series of heterocyclic products over a two week period without significant changes in catalytic activity
聚苯乙烯负载的 1,5,7-triazabicyclodec-5-ene (TBD) 被用作高度可回收且稳定的催化剂,用于将环氧胺转化为各种 2-恶唑烷酮支架。该方法将使用 CO 2作为有吸引力、廉价且丰富的 C 1源与无卤有机催化连续流动方法相结合,以促进有效合成药学相关的 2-取代恶唑烷酮小型库,包括已知的药物 Toloxatone . 包含同一批固定化催化剂的填充床反应器可用于在两周内连续合成一系列杂环产品,而催化活性不会发生显着变化。
The 1,3-diamino-propan-2-ol series. I. N-Aryl derivatives