netsh专利名称：NOVEL 7-AMINO-3-1-SUBSTITUTED
breaking badPYRIDINIO THIOMETHYL-DELTA3-CEPHEM
complimentary
DERIVATIVE AND PRODUCTION THEREOF 发明人：TAKAHASHI TAKUMI,SHIBANUMA
TADAO,MURAKAMI YUKIYASU,YAMAZAKI好听的英文
双侧乳腺切除术
ATSUKI,NAKANO KOJI,KODA AKIO,NAGANO剑桥少儿英语考级
KENSHO,MAEDA TETSUYA,HARA
RYUICHIRO
申请号：JP9552986
申请日：19860423pippy
公开号：JPS62142184A
公开日：bamboo forest
19870625
专利内容由知识产权出版社提供
6级作文
摘要：NEW MATERIAL:A compound shown by formula I (Ra is lower alkyl; Rb is H or Ra; n is 1-3) or its salt. EXAMPLE:7-Amino-3-(1-acetonyl-4-pyridinio)thiomethyl-DELTA<3>-cephem-4 -carboxylate. USE:An intermediate for cephalosporin antibiotics such as a compound shown by formula VI, etc. PREPARATION:A compound shown by formula II (R<1> is halogen or lower acyloxy; R<2> is H or carboxy-protecting group; R<3> is H or amino-protecting group) on its salt is reacted with a 1-substituted-3-mercaptopyridinium shown by formula III (Z(-) is anion) or a 1-substituted -2- or 4-thiopyridone shown by formula IV or formula V in an inert solvent optionally in the prence of a
pour是什么意思reaction promoter, deprotected when the reaction product has a protecting group, to give a compound shown by formula I.
申请人：YAMANOUCHI PHARMACEUT CO LTD
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