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
已经开发了一种三步合成法,可以从市售的3-硫磺烯(1)合成一种新的含氟二烯3-氯-4-氟噻吩-1,1-二氧化物(4)。化合物4作为Diels-Alder二烯的合成价值已通过其与各种类型的亲二烯体的反应得到证明:乙炔,烯烃,呋喃,醌和蒽。反应以高区域选择性进行,得到3-氟-4-氯取代的芳族化合物或环状氯氟二烯的良好产率。在与烯烃的反应中,经常发生立即的芳构化。在一些情况下,当与二烯反应时,化合物4表现为亲二烯体。