De-arylmethylation of N-mono- or N-diarylmethyl-beta-lactams; novel azetizinones having anti-bacterial activity
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0023097A1
公开(公告)日:1981-01-28
β-Lactams having a hydrogen atom on the nitrogen atom of the β-lactam ring are prepared by reacting an N-mono-or N-diarylmethyl- β-lactam with an acid or ceric ammonium nitrate to cleave the bond between the nitrogen atom and the mono- or diarylmethyl group; certain 4- substituted-3-phenylthio -2-azetizinones among the starting and product compounds have anti-bacterial activity. A valuable novel intermediate, 4-(2- phenylethenyl)-3-amino-N-di (p-anisyl) -methyl-2- azetizinone of the formula:
is prepared by reacting an acid anhydride derivative of a compound of the formula:
with a Schiff base of the formula:
and treating the resultant crystalline compound with an acid The amino group of the product compound is then acylated to form an amido derivative which is subjected to the above dearylmethylation to form an anti-bacterial substance.
通过使 N-单甲基或 N-二甲基-β-内酰胺与酸或硝酸铈铵反应,裂解氮原子与单甲基或二甲基二芳基之间的键,制备出在β-内酰胺环的氮原子上有一个氢原子的β-内酰胺;起始化合物和产物化合物中的某些 4-取代-3-苯硫基-2-氮杂环丁酮具有抗菌活性。一种有价值的新型中间体,4-(2-苯基乙烯基)-3-氨基-N-二(对甲氧基)-甲基-2-氮杂环丁酮的化学式如下:
式化合物的酸酐衍生物与式的希夫碱反应制备而成:
的酸酐衍生物与式
然后将产物化合物的氨基酰化形成氨基衍生物,该衍生物经上述去甲基化反应形成抗菌物质。