In chlorination, bromination, iodination, nitration, sulfonation, formylation, and trifluoroacetylation of [1]benzothieno[3,2-b]furan (1) the substituent enters the 2-position. The said halogenations go by the addition-elimination mechanism. When the substitution is continued, the second substituent enters the 6-position of heterocycle 1. The 1H and 13C NMR spectra have been completely assigned. Substituent effects on NMR parameters are discussed.
在对[1]苯并噻吩[3,2-b]呋喃(1)进行氯化、溴化、碘化、硝化、磺化、甲酰化和三氟乙酰化反应中,取代基进入2位。所述的卤代反应通过加成-消除机制进行。当继续进行取代反应时,第二个取代基进入杂环1的6位。已经完全指定了1H和13C NMR光谱。讨论了取代基对NMR参数的影响。