3-Chloro-4-fluorothiophene-1,1-dioxide. A new synthetically useful fluorodiene
作者:Wojciech Dmowski、Vladimir A. Manko、Ireneusz Nowak
DOI:10.1016/s0022-1139(98)00109-2
日期:1998.3
Simple, three step synthesis of a new fluorine containing diene, 3-chloro-4-fiuorothiophene-1,1-dioxide (4), from commercially available 3-sulpholene (1) has been developed. The synthetic value of compound 4 as a Diels-Alder diene has been demonstrated by its reactions with various type of dienophiles: acetylenes, alkenes, furans, quinone and anthracene. The reactions proceed with high regioselectivity