A 5-methylthiopenicillin analog and its transformation to novel bicyclic β-lactams
作者:Ajay K. Bose、John L. Fahey、M. S. Manhas
DOI:10.1002/jhet.5570100519
日期:1973.10
alkylation with methyl iodide provided 5,7-bismethylthio-6-methoxy-2,3-dihydro-1,4-thiazepine which reacted with methoxyacetyl chloride and triethylamine to give a novel 1,4-thiazabicyclo[5.2.0]non-5-ene. Other substituted bicyclic β-lactams of similar structure have also been synthesized.
甲氧基乙酰氯与2-甲硫基-2-噻唑啉的反应导致6-甲氧基-5-甲硫基戊烯的一种异构体的立体选择性生成,该异构体经过重排后生成6-甲氧基-7-甲硫基-5-氧代-2,3,4,用三氟乙酸处理时的5-四氢-1,4-噻嗪类。随后的硫代酰胺化和与碘甲烷的烷基化提供了5,7-双甲硫基-6-甲氧基-2,3-二氢-1,4-噻氮平,其与甲氧基乙酰氯和三乙胺反应,得到新的1,4-噻氮杂双环[5.2.0]非5烯。还已经合成了具有相似结构的其他取代的双环β-内酰胺。