以L-天冬氨酸为原料,经缩合得N-甲酰-L-天冬氨酸酐,然后经酰化、酯化、还原、成环得(S)-1-苄基-3-氨基吡咯烷,最后脱苄合成(S)-(+)3-氨基吡咯烷二盐酸盐,总收率62.8%。考察了工艺条件对反应的影响。(S)-1-苄基-3-氨基吡咯烷适宜工艺条件...以L-天冬氨酸为原料,经缩合得N-甲酰-L-天冬氨酸酐,然后经酰化、酯化、还原、成环得(S)-1-苄基-3-氨基吡咯烷,最后脱苄合成(S)-(+)3-氨基吡咯烷二盐酸盐,总收率62.8%。考察了工艺条件对反应的影响。(S)-1-苄基-3-氨基吡咯烷适宜工艺条件为:n(KBH4)∶n(H2SO4)∶n(混合物4)=3∶1.5∶1,反应温度50～60℃,反应时间6h,收率71.6%。产物结构经MS和1 H NMR进行确证。展开更多
Using an available compound 3 pentanone(1) as starting material, the key intermediate compound 4,6 dimethyl 3,7 nonandione(5) was synthesized through the addition elimination of silylenol ether and Michael addition of...Using an available compound 3 pentanone(1) as starting material, the key intermediate compound 4,6 dimethyl 3,7 nonandione(5) was synthesized through the addition elimination of silylenol ether and Michael addition of α methylene 3 pentanone(4) with silylenol ether(2). In the presence of chiral reagent 6 β phenyl amino 3 β,5α chlorestandiol(7), compound (5) was reduced by KBH 4 directly to give Tobacco Beetle Pheromone (7S) (-) 4,6 dimethyl 7 hydroxyl 3 nonanone(6). 25 D=-35 87°( c =0 23, CHCl 3), overall yield 23 9%.展开更多
文摘以L-天冬氨酸为原料,经缩合得N-甲酰-L-天冬氨酸酐,然后经酰化、酯化、还原、成环得(S)-1-苄基-3-氨基吡咯烷,最后脱苄合成(S)-(+)3-氨基吡咯烷二盐酸盐,总收率62.8%。考察了工艺条件对反应的影响。(S)-1-苄基-3-氨基吡咯烷适宜工艺条件为:n(KBH4)∶n(H2SO4)∶n(混合物4)=3∶1.5∶1,反应温度50～60℃,反应时间6h,收率71.6%。产物结构经MS和1 H NMR进行确证。
文摘Using an available compound 3 pentanone(1) as starting material, the key intermediate compound 4,6 dimethyl 3,7 nonandione(5) was synthesized through the addition elimination of silylenol ether and Michael addition of α methylene 3 pentanone(4) with silylenol ether(2). In the presence of chiral reagent 6 β phenyl amino 3 β,5α chlorestandiol(7), compound (5) was reduced by KBH 4 directly to give Tobacco Beetle Pheromone (7S) (-) 4,6 dimethyl 7 hydroxyl 3 nonanone(6). 25 D=-35 87°( c =0 23, CHCl 3), overall yield 23 9%.
