第 45 卷第 4 期Vol. 45 No. 4
2015 年 8 月Aug 2015

所属栏目:医药及中间体

6-氮杂-螺[3,4]辛烷盐酸盐的合成
胡 涛,殷跃凡 (扬子江药业集团有限公司,江苏 泰州 225321)
摘 要:以环丁酮(1)为起始原料,与磷酰乙酸三乙酯经Witting-Horner-Emmons反应得2-环丁烯基乙酸甲酯(2),然后与硝基甲烷经迈克尔加成得2-(1-硝基甲基)环丁基乙酸甲酯(3),再经氢化还原、分子内胺解得6-氮杂-螺[3,4]辛烷-7-酮(4),最后经氢化铝锂还原、酸化等5步反应得到目标化合物6-氮杂-螺[3,4]辛烷盐酸盐,总收率为27%。其结构经1H NMR和MS进行确证。
关键词:环丁酮;硝基甲烷;迈克尔加成;螺环化合物
中图分类号:TQ463  文献标识码:A  文章编号:1009-9212(2015)04-0036-03
Synthesis of 6-Azaspiro[3,4]octane Hydrochlorid
HU Tao, YIN Yue-fan (Yangtze River Pharmaceutical Group Co., Ltd., Taizhou 225321, China)
Abstract:Methyl-2-cyclobutylideneacetate(2)was prepared from Witting-Horner-Emmons reaction of Cyclobutanone(1)with triethyl phosphonoacetate; a subsequent Michael addition reaction was performed to obtain methyl 2-(1-(nitromethyl)cyclobutyl)acetate(3)in the presence of nitromethane; then the methyl 2-(1-(nitromethyl)cyclobutyl)acetate(3)was hydrogenated using Raney nickel as catalyst and the followed by an intra-aminonation to give 6-azaspiro[3,4]octane-7-one(4); the reduction of product 4 was performed using lithium aluminium hydride(AlLiH4); the subsequent acidization of the product from the reduction of 4 using hydrochoride to give the title compound 6-azaspiro[3,4]octane hydrochloride with a total 27% yield. Its structure was confirmed by 1H NMR and MS.
Key words:cyclobutanone; nitromethane; Michael Addition reaction; spiro compound
作者简介:胡 涛(1975-),男,工程师,博士,主要从事药物合成及工艺开发研究(E-mail:hutao@yangzijiang.com)。
收稿日期:2015-08-03