Preparation of Polyfunctionalized Aromatic Nitriles from Aryl Oxazolines

Hess, A.; Guelen, H. C.; Alandini, N.; Mourati, A.; Guersoy, Y. C. und Knochel, P. (2021): Preparation of Polyfunctionalized Aromatic Nitriles from Aryl Oxazolines. In: Chemistry-A European Journal, Bd. 28, Nr. 1

Abstract

A selective ortho,ortho'-functionalization of readily available aryl oxazolines by two successive magnesiations with sBu(2)Mg in toluene followed by trapping reactions with electrophiles, such as (hetero)aryl iodides or bromides, iodine, tosyl cyanide, ethyl cyanoformate or allylic bromides (39 examples, 62-99 % yield) is reported. Treatment of these aryl oxazolines with excess oxalyl chloride and catalytic amounts of DMF (50 degrees C, 4 h) provided the corresponding nitriles (36 examples, 73-99 % yield). Conversions of these nitriles to valuable heterocycles are reported, and a tentative mechanism is proposed.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 0947-6539
• Sprache: Englisch