Nucleosides and nucleotide. 145.1 synthesis of 2′-deoxy and 5′-phosphate derivatives of bredinin. A photochemical imidazole-ring cleavage and subsequent reconstruction of the base moiety
作者:Satoshi Shuto、Kimiyo Haramuishi、Akira Matsuda
DOI:10.1016/0040-4039(95)02110-8
日期:1996.1
2′-Deoxy and 5′-phosphate derivatives of bredinin (2 and 3, respectively) were synthesized. UV irradiation of bredinin with a mercury lamp in aqueous HCl gave the imidazole-ring cleavage product 7 in high yield, which was converted to 2′-deoxy derivative 13. Reconstruction of the imidazole ring of 13 with (EtO)3CH and subsequent deprotection afforded the desired 2′-deoxybredinin (2). Similarly, bredinin
合成了bredinin的2'-脱氧和5'-磷酸衍生物(分别为2和3)。用汞灯在盐酸水溶液中对布雷丁菌素进行紫外线照射,以高收率得到咪唑环裂解产物7,将其转化为2'-脱氧衍生物13。用(EtO)3 CH重建13的咪唑环并随后脱保护,得到所需的2'-脱氧布雷丁素(2)。类似地,通过光敏产物17合成了bredinin 5'-磷酸盐(3)。