Titanocene-Catalyzed Reductive Epoxide Opening: The Quest for Novel Hydrogen Atom Donors
作者:Andreas Gansäuer、Andriy Barchuk、Doris Fielenbach
DOI:10.1055/s-2004-831207
日期:——
presented. While the potentially attractive cyclopentadienes gave only moderate yields of the desired alcohols, substituted, nontoxic, and commercially available 1,4-cyclohexadienes, e.g. γ-terpinene, in combination with more elaborate catalysts gave better or similar results than the much more expensive and carcinogenic 1,4-cyclohexadiene. In the practically important reactions of Sharpless epoxides
提出了用于还原二茂钛催化的环氧化物开口的新型氢原子供体。虽然具有潜在吸引力的环戊二烯仅产生中等产率的所需醇,但取代的、无毒的和可商购的 1,4-环己二烯(例如 γ-萜品烯)与更复杂的催化剂结合使用比更昂贵和致癌的催化剂产生更好或相似的结果1,4-环己二烯。在 Sharpless 环氧化物及其衍生物的实际重要反应中,可以获得优异水平的环氧化物开口区域选择性。可以替代有毒且难以处理的叔丁基硫醇,同时增加所需产物的产率。