欧盟法规
C&L通报上下游产品
2-Chloro-5-(chloromethyl)thiophene ethyl 5‐chlorothiophene‐2‐carboxylate 5-Chloro-2-thiophenecarboxaldehyde 2-Chloro-5-(chloromethyl)thiophene 2-氯-5-氯甲基噻吩置于sodium Hydroxide,Sodium Acetate体系中,化学反应生成 5-氯-2-噻吩甲醇
参考文献:The Preparation Of 2-Thiophenealdehyde And Some Of Its Derivatives
标题:The Preparation Of 2-Thiophenealdehyde And Some Of Its Derivatives
摘要:
DOI:10.1021/jo01157A011
专利信息
专利号:US-5220074-A
优先权日:1990-01-25
标 题:Optically active isoxazole derivatives and intermediates for preparation thereof as well as processes for producing the same
发明人:TAKAHASHI TAKASHI; SAKAGUCHI KAZUHIKO
权利人:DAISO CO LTD
摘要:The present invention relates to novel optically active isoxazole derivatives represented by general formula: ##STR1## which are useful as intermediates for synthesis of prostaglandin and a process for producing the same as well as novel aldehyde compounds represented by general formula: ##STR2## which are intermediates for preparing the compounds [XI] described above and a process for preparation thereof. In the compounds shown by these formulae, R 1 represents an alkyl group or a cycloalkyl group which may have an alkoxy group or a group shown by -Ra-A-B (wherein Ra is an alkyl group; A is a hetero atom or an single bond; and B is an aromatic or hetero ring which may have a substituent(s)); and R 2 and R 3 , which may be the same or different, each represents an aralkyl group, a silyl group or an acyl group.
专利号:US-5266703-A
优先权日:1990-01-25
标 题:Optically active isoxazole derivatives
发明人:TAKAHASHI TAKASHI; SAKAGUCHI KAZUHIKO
权利人:DAISO CO LTD
摘要:The present invention relates to novel optically active isoxazole derivatives represented by general formula: ##STR1## which are useful as intermediates for synthesis of prostaglandin and a process for producing the same as well as novel aldehyde compounds represented by general formula: ##STR2## which are intermediates for preparing the compounds [XI] described above and a process for preparation thereof. In the compounds shown by these formulae, R 1 represents an alkyl group or a cycloalkyl group which may have an alkoxy group or a group shown by -Ra-A-B (wherein Ra is an alkyl group; A is a hetero atom or an single bond; and B is an aromatic or hetero ring which may have a substituent(s)); and R 2 and R 3 , which may be the same or different, each represents an aralkyl group, a silyl group or an acyl group.