名称:
                                Novel synthesis of new polyfunctionalized oxazoles via ring contraction of (3),5-(di)chloro-1,4-oxazin-2-ones
                             
                            
                                摘要:
                                On treatment with nucleophiles, (3),5-(di)chloro-1,4-oxazin-2-ones undergo a ring contraction yielding new polyfunctionalized oxazoles which afford furan derivatives on reaction with acetylenes.