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。