Novel Synthesis of the Main Central 2,3,6-Trisubstituted Pyridine Skeleton [Fragment A-B-C] of a Macrobicyclic Antibiotic, Cyclothiazomycin
作者:Chung-gi Shin、Akihiro Okabe、Akinori Ito、Akio Ito、Yasuchika Yonezawa
DOI:10.1246/bcsj.75.1583
日期:2002.7
the protected Ser thioamide derivative with 3-bromopyruvate, and then thiazolination of the C-terminal Ser residue of the sequence. Secondly, an efficient synthesis of the central 2-(2-2-[(1R)-1-aminoethyl]pyridin-6-yl}thiazol-4-yl)-4,5-dihydrothiazole-4-carboxylate [Fragment B derivative] was also achieved by thiazolation of the formyl group of the 2-(1-aminoethyl)-6-formylpyridine derivative, and
首先完成了大双环抗生素环噻霉素的主要中央 2,3,6-三取代吡啶骨架 [受保护的片段 ABC] 的有用合成。首先,连接到主要吡啶骨架的 6-取代基上的 2-[2-(2-取代的噻唑-4-基)]-4,5-二氢噻唑-4-羧酸酯 [片段 A 衍生物] 是由以下合成的:用 3-溴丙酮酸对受保护的 Ser 硫代酰胺衍生物进行两次连续的噻唑化,然后对序列的 C 端 Ser 残基进行噻唑化。其次,有效合成中心 2-(2-2-[(1R)-1-aminoethyl]pyridin-6-yl}thiazol-4-yl)-4,5-dihydrothiazole-4-carboxylate [片段 B [衍生物]也通过2-(1-氨基乙基)-6-甲酰基吡啶衍生物的甲酰基的噻唑化,然后噻唑化来实现。第三,