<i>cis</i>-Tetrahydrofuran-3,4-diol Structure as a Key Skeleton of New Protecting Groups Removable by Self-Cyclization under Oxidative Conditions
作者:Eri Utagawa、Mitsuo Sekine、Kohji Seio
DOI:10.1021/jo061006v
日期:2006.9.1
once-generated neighboring hydroxyl group on the acyl carbon. It turned out that these acyl groups could be introduced into the 5‘-hydroxyl group of a 3‘-O-protected thymidine derivative by use of the corresponding acyl imidazolides or 4-nitrophenyl esters as well as by reaction with carbonyldiimidazole or 4-nitrophenyl chloroformate. Among the acyl groups tested, it was found that the CTFOC group could be
已经研究了具有顺式-四氢呋喃-3,4-二醇(1,4-脱水赤藓糖醇)主链结构和TrS或MMTrS基团的各种碳酸酯型酰基基团,作为5'-羟基的新“保护”保护基团组核苷。这些酰基的设计方式是通过I 2促进去除TrS或MMTrS基团,然后进行自我环化,使涉及到一次生成的相邻羟基在分子内攻击酰基碳的分子进行自我环化,从而对它们进行脱保护。结果表明,这些酰基可以引入3'- O的5'-羟基通过使用相应的酰基咪唑啉化物或4-硝基苯基酯以及与羰基二咪唑或4-硝基苯基氯甲酸酯反应来保护-胸腺嘧啶核苷衍生物。在测试的酰基中,发现可以将CTFOC基团容易地引入3'-掩蔽的脱氧核糖核苷衍生物的5'-羟基中,并在温和的条件下使用碘将其迅速去除。