Copper‐ or rhodium‐catalyzed reactions of diazocarbonyl compounds with β‐hydroxyketones give highly substituted tetrahydrofurans with excellent diastereoselectivity. Under mild conditions, the single‐step process starts as a carbene OH insertion reaction, but is diverted by an intramolecular aldol reaction.
重氮羰基化合物与β-羟基酮的
铜或
铑催化反应可得到高度取代的
四氢呋喃,具有出色的非对映选择性。在温和条件下,单步过程从卡宾OH插入反应开始,但被分子内羟醛反应转移。