通过铜催化 1,7-烯炔的磺酰化环化/卤化,开发了一种有效的立体选择性合成具有磺酰基的卤代 ( E )-4-亚甲基苯并二氢吡喃,其中使用亚磺酸钠作为磺酰基试剂,并提供四丁基卤化铵。卤素源。形成的烯基C-X键很有价值,可以有效地进行后续的水解、烯基化、炔基化、芳基化、烷基硫基化和烷氧基化,以提供一系列高度官能化的4-亚甲基色满。
The olefin isomerization/enantioselective intramolecular Alder-ene reaction cascade was achieved by using a cationic rhodium(I)/(R)-BINAP complex as a catalyst. A variety of substituted dihydrobenzofurans and dihydronaphthofurans were obtained from phenol- or naphthol-linked 1,7-enynes, respectively, with good yields and ee values.