A compound ethyl(5S,6R)-2-(4-methylphenyl)-6-[(1R)-tert-butyldimethylsilyloxyethy]-penem-3-carboxylate was synthesized through displacement,acylation and Wittig cyclization reaction of optically active material(3R,4R)...A compound ethyl(5S,6R)-2-(4-methylphenyl)-6-[(1R)-tert-butyldimethylsilyloxyethy]-penem-3-carboxylate was synthesized through displacement,acylation and Wittig cyclization reaction of optically active material(3R,4R)-3-[(1R)-tert-butyldimethylsilyloxyethyl]-4-acetoxy-2-azetidi-none(4AA)upon thionocarboxlic acid.The intermediates and the target product were characterized by 1HNMR,IR,elementary analysis and MS.展开更多
Polysubstituted cyclopropane was easily constructed from p hydroxyl benzopropene type compounds when catalytic amount PdCl 2 was used. In this paper 1 methyl 2 ethyl 3,3 di(3,5 dimethoxyl 4 hydroxyl)benzocyclopr...Polysubstituted cyclopropane was easily constructed from p hydroxyl benzopropene type compounds when catalytic amount PdCl 2 was used. In this paper 1 methyl 2 ethyl 3,3 di(3,5 dimethoxyl 4 hydroxyl)benzocyclopropane and 1 methyl 2 ethyl 3,3 di(3,5 dihydroxyl 4 methoxyl)benzocyclopropane were first synthesized.展开更多
The asymmetric Michael addition-elimination reaction of chiral 5-(1S)-bornyloxy-3,4-dibromo-2(5H)furanones and some amines are investigated.Four new chiral bornyl amine derivatives 6a～6d are obtained.they are identif...The asymmetric Michael addition-elimination reaction of chiral 5-(1S)-bornyloxy-3,4-dibromo-2(5H)furanones and some amines are investigated.Four new chiral bornyl amine derivatives 6a～6d are obtained.they are identified by IR,1H NMR,13C NMR,HRMS and so on.It offer a new way to synthetize more chiral bornyl amine derivatives.展开更多
文摘A compound ethyl(5S,6R)-2-(4-methylphenyl)-6-[(1R)-tert-butyldimethylsilyloxyethy]-penem-3-carboxylate was synthesized through displacement,acylation and Wittig cyclization reaction of optically active material(3R,4R)-3-[(1R)-tert-butyldimethylsilyloxyethyl]-4-acetoxy-2-azetidi-none(4AA)upon thionocarboxlic acid.The intermediates and the target product were characterized by 1HNMR,IR,elementary analysis and MS.
文摘Polysubstituted cyclopropane was easily constructed from p hydroxyl benzopropene type compounds when catalytic amount PdCl 2 was used. In this paper 1 methyl 2 ethyl 3,3 di(3,5 dimethoxyl 4 hydroxyl)benzocyclopropane and 1 methyl 2 ethyl 3,3 di(3,5 dihydroxyl 4 methoxyl)benzocyclopropane were first synthesized.
文摘The asymmetric Michael addition-elimination reaction of chiral 5-(1S)-bornyloxy-3,4-dibromo-2(5H)furanones and some amines are investigated.Four new chiral bornyl amine derivatives 6a～6d are obtained.they are identified by IR,1H NMR,13C NMR,HRMS and so on.It offer a new way to synthetize more chiral bornyl amine derivatives.
