Copper(II)nitrate catalyzed regioselective protection of primary alcohols with 4,4′-dimethoxytrityl and 2,7-dimethyl-9-phenyl xanthen-9-yl groups in nucleosides and carbohydrates
作者:Srishylam Penjarla、S. Rajendra Prasad、Dhande Sudhakar Reddy、Shyamapada Banerjee、Santhosh Penta、Yogesh S. Sanghvi
DOI:10.1080/15257770.2018.1460480
日期:2018.4.3
ABSTRACT Regioselective protection of primary hydroxyl group in nucleoside and carbohydrate analogs was accomplished using dimethoxytrityl alcohol (DMTr-OH) or dimethylpixyl alcohol (DMPx-OH) in presence of copper(II)nitrate as a Lewis acid catalyst. Excellent selectivity was observed for the protection of primary hydroxyl group over secondary while glycosidic bond remain unaffected. Utility of this
摘要 在作为路易斯酸催化剂的硝酸铜 (II) 存在下,使用二甲氧基三苯甲醇 (DMTr-OH) 或二甲基苯甲醇 (DMPx-OH) 实现了核苷和碳水化合物类似物中伯羟基的区域选择性保护。观察到优异的选择性保护伯羟基而不是仲羟基,而糖苷键不受影响。通过脂肪族无环和环状二醇的 DMTr 和 DMPx 保护进一步举例说明了该方法的实用性。