Total Synthesis and the Confirmation of the Revised Structures of Botcinins A and B
作者:Isamu Shiina、Hiroki Fukui、Keisuke Tsuji、Yuma Umezaki
DOI:10.3987/com-08-s(d)52
日期:——
stereoselective total syntheses of botcinins A (1) and B (2), and homobotcinin E (4), a homologue of botcinin E (3), have been achieved starting from a polyoxygenated tetrahydropyran intermediate 15 via formation of botcinic acid (12) and botcineric acid (13). Through the total syntheses, three actual relationships are revealed, that is, (i) the structure of botcinin A (1) is identical with the revised structure
- 从聚氧四氢吡喃中间体 15 开始,通过形成肉毒杆菌酸 (12 ) 和肉毒杆菌酸 (13)。通过全合成,揭示了三个实际关系,即 (i) botcinin A (1) 的结构与天然化合物的修改结构相同,以前假定为 3-O-乙酰基-2-表肉毒杆菌素 (5),(ii) 肉毒杆菌素 B (2) 的结构与修改后的天然化合物结构相同,它应该是 3-O-乙酰基-2-表肉毒杆菌素 (6),和 (iii)以前假定为 2-epihomobotcininide (8) 的天然化合物的结构必须修改为homobotcinin E (4)。