A new protecting group ‘3′,5′-O-sulfinyl’ for xylo-nucleosides. A simple and efficient synthesis of 3′-amino-3′-deoxyadenosine (a puromycin intermediate), 2,2′-anhydro-pyrimidine nucleosides and 2′,3′-anhydro-adenosine
作者:Ken-ichi Takatsuki、Makoto Yamamoto、Sumito Ohgushi、Shigeo Kohmoto、Keiki Kishikawa、Haruhiro Yamashita
DOI:10.1016/j.tetlet.2003.10.092
日期:2004.1
We developed a new protecting group, the cyclic sulfite for the protection of the 3′,5′-dihydroxy group of nucleosides. Seven cyclic sulfites, 4a–c, 5a–b, and 6a–b were prepared in high yields from the corresponding xylo-uridines 1 and 2, and xylo-adenosines 3 with thionyl chloride, respectively. Synthesis of the puromycin intermediate 8 was carried out by deprotection of the sulfite moiety through
我们开发了一种新的保护基团,为保护3的循环亚',5 '核苷的二羟基组。分别由相应的木尿苷1和2以及木苷腺苷3和亚硫酰氯分别高产率地制备了七个环状亚硫酸盐4a – c,5a – b和6a – b。嘌呤霉素中间体的合成8是由亚硫酸盐部分的脱保护通过2的分子内环化进行' -α -氨基甲酸酯7。