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href=\"\u002Fen\u002Fcas\u002F498-66-8_844685.html#duXinDiv\">降冰片烯毒性英文版\u003C\u002Fa>\u003C\u002Fp>\n\n\u003C\u002Ftd>","\u003Cp>1.制法：\u003C\u002Fp>\u003Cp>\u003C\u002Fp>\u003Cp>2-莰酮对甲苯磺酰腙(4):于装有回流冷凝器的反应瓶中，加入对甲苯磺酰肼(3)44g（0.24mol），樟脑(2)31.6（0.2mol）和300mL95%的乙醇，1mL浓盐酸，加热回流反应2h。冰浴冷却，抽滤析出的结晶，空气中干燥。用乙醇重结晶，得无色针状结晶2-莰酮对甲苯磺酰腙(4)50g,mp163～164℃,收率73%。2-莰烯(1):于装有搅拌器、温度计、滴液漏斗、回流冷凝器(安氯化钙干燥管)的反应瓶中，加入上述化合物(4)32g（0.1mol），干燥的乙醚450mL，水浴冷却，搅拌下慢慢滴加150mL1.6mol\u002FL的甲基锂的乙醚溶液(0.24mol),约1h加完。反应中沉淀出对甲苯亚磺酸锂，同时反应液变为深橙红色。小心地加入少量的水以使甲基锂分解，而后加水200mL。分出有机层，水洗四次。水层合并后用乙醚提取两次。合并乙醚层，无水硫酸钠干燥。分馏蒸出乙醚至剩余50～60mL，加入100mL新蒸馏的戊烷，蒸馏至30～50mL，再加入戊烷，蒸馏至30～40mL。过中性氧化铝色谱柱，用戊烷洗脱。分馏浓缩蒸出溶剂戊烷，将剩余物转入50mL烧瓶中，借助于油浴和红外灯通过U型管进行蒸馏。分出前馏分(戊烷和2-莰烯)后，在冷却的接受瓶中得到无色结晶2-莰烯\u003Csup>①\u003C\u002Fsup>(1)8.5～8.8g,mp110～111℃,收率63%～65%。注：①利用该方法可以由酮制备烯类化合物。由2-甲基环己酮的对甲苯磺酰腙可以制备-3-甲基环己烯，气相色谱分析表明收率为98%。\u003C\u002Fp>\u003Cp>2.于装有搅拌器、回流冷凝器(装氯化钙干燥管)、滴液漏斗的反应瓶中，加入无水乙醇600mL，分批加入切碎的金属钠46g(2.0mol),当钠全部反应完后，滴加丙二酸二乙酯（2）160g(1.0mol)。加完后于65℃滴加烯丙基溴(3)254g（2.1mol），约3～4h加完。反应中析出溴化钠沉淀，用酚酞试纸检验反应是否完全。当反应液与酚酞试纸不变色时，搅拌下回流1h。蒸出约400mL乙醇，冷却后加入450mL水。分出有机层，水层用苯提取三次。合并有机层，无水硫酸钠干燥，蒸出苯后，减压分馏，收集122～124℃\u002F0.94kPa的馏分，得二烯丙基丙二酸二乙酯(1)195～214g,收率82%～87%。\u003C\u002Fp>","\u003Ctd>\n\n\u003Ca href=\"\u002Fen\u002Fcas\u002F498-66-8_844685.html#MSDSDiv\">降冰片烯MSDS英文版\u003C\u002Fa>\n\n\u003C\u002Ftd>","2026-08-21T07:51:12.859463Z",false,[361,367,373,379,385,391,397,403,409,415,421,427],{"slug":362,"cid":363,"name":364,"nameZh":365,"cas":366},"785882042352013312","J-21977-2","Cycloheptane","环庚烷","291-64-5",{"slug":368,"cid":369,"name":370,"nameZh":371,"cas":372},"785883203456995328","J-1154283-9","3,3-Dimethylpyrrolidine","3,3-二甲基吡咯烷","3437-30-7",{"slug":374,"cid":375,"name":376,"nameZh":377,"cas":378},"785872993652838400","J-1993580-9","Oxepane","氧杂环庚烷","592-90-5",{"slug":380,"cid":381,"name":382,"nameZh":383,"cas":384},"785883885836701696","J-41075-3","3-Aminopentane","3-氨基戊烷","616-24-0",{"slug":386,"cid":387,"name":388,"nameZh":389,"cas":390},"785888712742408192","J-922352-3","2-Methylpyrrolidine","2-甲基吡咯烷","765-38-8",{"slug":392,"cid":393,"name":394,"nameZh":395,"cas":396},"785894875575881728","J-39466-1","1,3-difluoropropane","1,3-二氟丙烷","462-39-5",{"slug":398,"cid":399,"name":400,"nameZh":401,"cas":402},"785883357849325568","J-7986-7","Polydimethylsiloxane","聚二甲基硅氧烷","9016-00-6",{"slug":404,"cid":405,"name":406,"nameZh":407,"cas":408},"785892634022383616","J-33208-1","Allylthiourea","烯丙基硫脲","109-57-9",{"slug":410,"cid":411,"name":412,"nameZh":413,"cas":414},"785884697602297856","J-23915-6","Chlorotrifluoroethylene","三氟氯乙烯","79-38-9",{"slug":416,"cid":417,"name":418,"nameZh":419,"cas":420},"785889302788706304","J-27201-5","3-chlorocyclohexene","3-氯环己烯","2441-97-6",{"slug":422,"cid":423,"name":424,"nameZh":425,"cas":426},"785881264988098560","J-1361623-4","3-Chlorohexane","3-氯己烷","2346-81-8",{"slug":428,"cid":429,"name":430,"nameZh":431,"cas":432},"785896576466817024","J-44491-7","Polyvinyl chloride","聚氯乙烯","9002-86-2",1794253625171,"zh-CN",[]]