Synthetic studies towards the tunicamycins and analogues based on diazo chemistry. Total synthesis of tunicaminyl uracil
作者:Francisco Sarabia、Laura Martín-Ortiz、F. Jorge López-Herrera
DOI:10.1039/b307674a
日期:——
tunicamycins, a complex family of nucleosides with potent antibiotic and antiviral activities is reported based on diazo chemistry. The corresponding precursors for the synthesis of tunicaminyl uracil derivatives, the non-stabilized diazo derived from 13 and the aldehyde derivative of uridine, compound 4, were prepared efficiently from commercially available D-galactal and uridine, respectively. After a high
据报道,基于重氮化学方法,合成了衣霉素,一种具有有效抗生素和抗病毒活性的复杂核苷家族,是一种合成方法。分别由市售的D-半乳糖和尿苷有效地制备了相应的前体,其合成了衣氨酰胺基尿嘧啶衍生物,衍生自13的非稳定重氮和尿苷的醛衍生物(化合物4)。在高产率的偶联反应后得到酮14,立体选择性还原提供了相应的衣氨酰尿嘧啶衍生物17a及其C-7差向异构体17b。相似地,在必需的结构单元中重氮和醛官能团的相互转化获得了酮32,该酮在还原后产生了相应的7-脱氧-6-羟基衣氨酰尿嘧啶类似物33a和33b。