2,3-Dihydro-5H-1,4-benzoxathiepins were prepared by intramolecular Friedel-Crafts reactions of ethylα-[2-(aryloxy)ethylthio]-α-chloroacetates or by acid-catalyzed cyclizations of ethylα-[2-(aryloxy)ethylsulfinyl]-acetate. 1,2,3,5-Tetrahydro-4,1-benzothiazepines were similarly prepared.
通过α-[2-(芳氧基)乙硫基]-α-氯乙酸乙酯的分子内Friedel-Crafts反应或通过α-[2]的酸催化环化反应制备2,3-二氢-5 H -1,4-苯并噻吩-(芳氧基)乙基亚磺酰基]-乙酸酯。相似地制备了1,2,3,5-四氢-4,1-苯并硫氮杂s。