3,3-伸乙二氧-4-甲苯磺醯氧甲基四氫噻吩(5)及4-溴甲基-3,3-伸乙二氧四氫噻吩(9)可由其相對應的甲酯3經兩個反應步驟製得,化合物5及9與低鹼性親核試劑可順利進行取代反應,但當9與萃胺作用時,僅進行脫去反應。
3, 3- Ethylenedioxy-4-[(toluenesulfonyloxy)methyl]tetrahydrothiophene (5) and 4-(bromomethyl)-3, 3-ethylenedioxytetrahydrothiophene (9) have been prepared from the corresponding methyl ester 3 in two steps. Nucleophilic substitution reactions of 5 and 9 with nucleophiles of low-basicity proceed smoothly. Whereas elimination reaction predominates when aniline is reacted with 9.