학술저널
6-엑소메칠렌 펜남 유도체의 합성
Synthesis of 6-Exomethylene Penam Derivatives
- 대한약학회
- 약학회지
- 제44권 제2호 (2000년)
-
2000.04128 - 134 (7 pages)
- 2
The synthesis of new 6-exomethylene penams with triazole ring was described. The 6,6-dibromopenam 5 was treated with CH3MgBr and carbaldehyde 4 to afford the 6-bromo-6-(1-hydroxy-1-methyl)penicillanate 6, which was reactod with acetic anhydride to give acetoxy compound 7. The deacetobromination of 7 with zinc and acetic acid gave 6-exomethylenpenams, Z-isomer 8 and E-isomer 9, which were oxidized to sulfones 10 and 11 by m-CPBA. The p-methoxybenzyl compounds 6~11 were deprotected by AlCl3 and neutralized to give the sodium salts 12~17.
(0)
(0)