Going to the source: Formamides or parentamines were used as an aminogroupsource for the silver‐mediated amination of benzoxazoles. Although reactions with formamides proceeded at high temperatures, the directamination with amines took place under much milder conditions (see scheme). Optically active aminogroups could also be installed without racemization.
a developed amination process. The reaction was completed in an hour at 100–150 °C in a microwave reactor without the use of external catalyst or additive. Key benefits of this process include an on-water reaction, short reaction time, being scalable and catalyst-free, and use of 2-mercaptobenzoxazoles as an inexpensive starting material having low environmental impact in its preparation.
Synthesis of New Armed Cyclopolyamines and Their Selective Extraction Properties for Metal Ions
作者:Kiyoshi Matsumoto、Keisuke Fukuyama、Hirokazu Iida、Mitsuo Toda、J. William Lown
DOI:10.3987/com-94-6952
日期:——
A variety of new armed cyclopolyamines were prepared by high pressure SNAr reactions (0.8 GPa, 100 degrees C) of cyclopolyamines with heteroaromatic halides. Certain of these agents show selective extraction properties for Hg2+ and Ag+ ions.