【英语翻译Asolutionof45,7g(0.38mole)offreshlydistilled(Note1)phenylacetaldehydein100mlbenzenewascooledto0°Candasolutionof15.5g(0.5mole)ofanhydrousmethylamineinbenzene(Note2)wasadded.Anexothermicreactionoccur】
英语翻译
Asolutionof45,7g(0.38mole)offreshlydistilled(Note1)phenylacetaldehydein100mlbenzenewascooledto0°Candasolutionof15.5g(0.5mole)ofanhydrousmethylamineinbenzene(Note2)wasadded.Anexothermicreactionoccuredwithseparationofwater;startrefluxingwithaDean-Starktrapattachedtotherefluxcondensertocollectthewaterthatisgeneratedinthereaction.Whennomorewaterseparates,distilloffthesolventanddistillthealdimine.
MethylGrignardreagentispreparedbyadding71g(0.5mole)ofmethyliodidetoasuspensionof12.2g(0.5mole)ofMgturningsin150mldryether.Addingacrystalofiodinespeedsupthereaction.Afterabout1/2hourstanding,cooltheGrignardreagentto0°Candadddropwisethealdimineobtainedinthepreviousstep(thisbetterbe0.32mole!)dissolvedintheminimumamountofdryether.Aftertheaddition,removetheice-bathandstartrefluxingthesolution(Iguessforabout2hours).Afterwards,decomposetheexcessGrignardreagentbyaddingdilute(15%)icecoldHCluntilthepH10,extractwith3x250mletheranddrytheether.
实在对不起
唐进国回答:
将一45.7g(0.38摩尔)的新蒸馏的苯乙醛溶到100ml苯溶液中,降温到0摄氏度,加入含15.5g(0.5摩尔)无水甲胺的苯溶液.放热反应发生的同时有水生成;用一个dean-starktrap接在回流冷凝管上用于收集反应中生成的水.当收...
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