Thermal Rearrangement of 2-Bromooxazolines to 2-Bromoisocyanates
摘要:
A unprecedented thermally induced rearrangement of 2-bromo-4-substituted oxazolines into 2-bromoisocyanates with high selectivity has been observed. Isolated yields of 85-90% were obtained with 2-bromo-4-phenyloxazoline, 2-bromo-4-isopropyloxazoline, or 2-bromo-4,4dimethyloxazoline. In addition, chiral aziridinecarboxamdes or 2-aminooxazolines could be selectively obtained from the corresponding 2-bromo isocyanate depending on reaction conditions.
Thermal Rearrangement of 2-Bromooxazolines to 2-Bromoisocyanates
摘要:
A unprecedented thermally induced rearrangement of 2-bromo-4-substituted oxazolines into 2-bromoisocyanates with high selectivity has been observed. Isolated yields of 85-90% were obtained with 2-bromo-4-phenyloxazoline, 2-bromo-4-isopropyloxazoline, or 2-bromo-4,4dimethyloxazoline. In addition, chiral aziridinecarboxamdes or 2-aminooxazolines could be selectively obtained from the corresponding 2-bromo isocyanate depending on reaction conditions.
Thermal Rearrangement of 2-Bromooxazolines to 2-Bromoisocyanates
作者:Carole Foltz、Stéphane Bellemin-Laponnaz、Markus Enders、Hubert Wadepohl、Lutz H. Gade
DOI:10.1021/ol7027509
日期:2008.1.1
A unprecedented thermally induced rearrangement of 2-bromo-4-substituted oxazolines into 2-bromoisocyanates with high selectivity has been observed. Isolated yields of 85-90% were obtained with 2-bromo-4-phenyloxazoline, 2-bromo-4-isopropyloxazoline, or 2-bromo-4,4dimethyloxazoline. In addition, chiral aziridinecarboxamdes or 2-aminooxazolines could be selectively obtained from the corresponding 2-bromo isocyanate depending on reaction conditions.