Synthetic studies on .BETA.-lactam antibiotics. XIV. Synthesis of 7H-azeto[1,2-a]thieno[2,3-c]pyridine derivatives.
作者:TETSUJI KAMETANI、KAZUO KIGASAWA、MINEHARU HIIRAGI、KIKUO WAKISAKA、HIDEO SUGI、KEIZO TANIGAWA
DOI:10.1248/cpb.28.1196
日期:——
Cycloaddition of the 4, 5-dihydrothieno [2, 3-c] pyridine (6) and phthalimidoacetyl chloride gave a novel tricyclic β-lactam, methyl 4, 5, 8, 8a-tetrahydro-7-oxo-8-phthalimido-7H-azeto [1, 2-a] thieno [2, 3-c] pyridine-5-carboxylate (7). On deprotection followed by acylation, this gave the 8-acylamino derivatives 9 and 10.
4, 5-二氢噻吩并[2, 3-c]吡啶(6)与邻苯二甲酰亚胺乙酰氯进行环化反应,得到了一种新型的三环β-内酰胺,即 4, 5, 8, 8a-四氢-7-氧代-8-邻苯二甲酰亚胺并-7H-氮杂环并[1, 2-a]噻吩并[2, 3-c]吡啶-5-羧酸甲酯(7)。脱保护后进行酰化,可得到 8-酰氨基衍生物 9 和 10。