Described is a method of synthesizing 6-(5-ethoxyhept-1-yl)bicyclo[3.3.0]octan-3-one by reacting 3-(5-ethoxyhept-1-yl)cyclopentene with dichloroketene. The resulting reaction products are reacted with acetic acid and zinc to produce 4-(5-ethoxyhept-1-yl)bicyclo[3.2.0]heptan-6-one and 4-(5-ethoxyhept-1-yl)bicyclo[3.2.0]heptan-7-one, which are reacted with trimethylsulfonium iodide to produce 2-(5-ethoxyhept-1-yl)spiro[bicyclo[3.2.0]heptane-6,2′-oxirane] and 4-(5-ethoxyhept-1-yl)spiro-[bicyclo-[3.2.0] heptane-6,2′-oxirane]. Lithium iodide is reacted with 2-(5-ethoxyhept-1-yl)spiro[bicyclo[3.2.0]heptane-6,2′-oxirane] and 4-(5-ethoxyhept-1-yl)spiro-[bicyclo-[3.2.0]heptane-6,2′-oxirane] to produce 6-(5-ethoxyhept-1-yl)bicyclo[3.3.0]octan-3-one. A method of synthesizing 6-(5-methoxyhept-1-yl)bicyclo[3.3.0]octan-3-one is also described.
本方法描述了通过将3-(5-乙氧庚-1-基)
环戊烯与二
氯酮反应来合成6-(5-乙氧庚-1-基)双环[3.3.0]辛-3-酮。将产生的反应产物与
乙酸和
锌反应,生成4-(5-乙氧庚-1-基)双环[3.2.0]庚-6-酮和4-(5-乙氧庚-1-基)双环[3.2.0]庚-7-酮,这些产物与三甲基
硫鎓
碘反应,生成2-(5-乙氧庚-1-基)螺[双环[3.2.0]
庚烷-6,2'-环氧]和4-(5-乙氧庚-1-基)螺[双环[3.2.0]
庚烷-6,2'-环氧]。将
碘化
锂与2-(5-乙氧庚-1-基)螺[双环[3.2.0]
庚烷-6,2'-环氧]和4-(5-乙氧庚-1-基)螺[双环[3.2.0]
庚烷-6,2'-环氧]反应,生成6-(5-乙氧庚-1-基)双环[3.3.0]辛-3-酮。还描述了一种合成6-(5-甲氧庚-1-基)双环[3.3.0]辛-3-酮的方法。