Orthogonal C–O Bond Construction with Organogermanes
作者:Amit Dahiya、Avetik G. Gevondian、Franziska Schoenebeck
DOI:10.1021/jacs.3c01081
日期:——
involves the selective coupling of arylgermanes with alkyl alcohols (primary, secondary and tertiary) as well as carboxylic acids, tolerating otherwise widely employed coupling handles, such as aromatic (pseudo)halogens (C–I, C–Br, C–Cl, C–F, C–OTf, C–OFs), silanes and boronic acid derivatives. This unprecedented [Ge]-based C–O bond construction is rapid (15 min to few hours reaction time), air-tolerant
Ultrasound-promoted green approach for the synthesis of sulfonamides using natural, stable and reusable Natrolite nanozeolite catalyst at room temperature
Natural Natrolite nanozeolite has been investigated as an efficient and reusable catalyst for the N-sulfonylation of amines under ultrasound irradiation at room temperature. Compared with traditional methods, the significant advantages for method are green solvent, milder and cleaner conditions, higher purity and yields, shorter reaction time, easier work-up procedure and the lower generation of waste or pollutions. The catalyst can be recovered and reused several times without significant loss of its catalytic activity. (C) 2013 Elsevier B.V. All rights reserved.
304. Polyamines. Part III. The preparation of unsymmetrical amines of the types NHR·C<sub>2</sub>H<sub>4</sub>·NH·C<sub>2</sub>H<sub>4</sub>·NH<sub>2</sub>and NH<sub>2</sub>·C<sub>2</sub>H<sub>4</sub>·NH·C<sub>3</sub>H<sub>6</sub>·NH<sub>2</sub>, and the action of ammonia on di-p-toluenesulphonylbis-(β-chloroethyl)ethylenediamine