Stereocontrolled Syntheses of Deoxyribonucleosides via Photoinduced Electron-Transfer Deoxygenation of Benzoyl-Protected Ribo- and Arabinonucleosides
作者:Zhiwei Wang、Daniel R. Prudhomme、Jason R. Buck、Minnie Park、Carmelo J. Rizzo
DOI:10.1021/jo0003652
日期:2000.9.1
arabinose, and xylose glycosylation precursors were synthesized bearing C2-esters capable of directing Vorbrüggen glycosylation. The key step is the regioselective deoxygenation of the desired hydroxyl group as either the benzoyl- or 3-(trifluoromethyl)benzoyl derivative. This deoxygenation is accomplished via a photoinduced electron-transfer (PET) mechanism using carbazole derivatives as the photosensitizer
描述了β2'-脱氧-,α2'-脱氧-,β3'-脱氧-和β2',3'-脱氧核糖核苷的立体控制的从头合成。合成了具有战略指导意义的受保护的核糖,阿拉伯糖和木糖糖基化前体,它们带有能够指导Vorbrüggen糖基化的C2-酯。关键步骤是所需羟基作为苯甲酰基-或3-(三氟甲基)苯甲酰基衍生物的区域选择性脱氧。该脱氧是通过使用咔唑衍生物作为光敏剂的光诱导电子转移(PET)机制完成的。所需脱氧核苷的合成通常从一个容易获得的常见前体分三步进行。