完成了卤代酮和酮酯的不对称催化烯丙基化,以产生许多具有优异反应性和对映选择性的高烯丙基叔醇。在手性 In III / N , N'-二氧化物催化剂的存在下,证明了 γ-取代的烯丙基三氟硼酸钾不寻常的 α-选择性烯丙基化为酮。对照实验和 DFT 计算表明,手性 In III / N , N'-二氧化物催化剂具有双重作用:通过金属转移和路易斯酸活化形成烯丙基物种。提供了一种可能的反应途径来理解 α-选择性优于 γ-选择性。
Efficient Allylation of Active Ketones Promoted by p-Nitrobenzoic Acid
作者:Zhengfeng Xie、Guilong Li、Gang Zhao、Jide Wang
DOI:10.1002/cjoc.201090210
日期:——
A general and practical method of allylation of carbonyl compounds promoted by p‐nitrobenzoicacid under mild reaction condition has been developed. p‐Nitrobenzoicacid can be easily recovered after workup by aqueous HCl.
Catalytic, Regioselective 1,4‐Fluorodifunctionalization of Dienes
作者:You‐Jie Yu、Michael Schäfer、Constantin G. Daniliuc、Ryan Gilmour
DOI:10.1002/anie.202214906
日期:2023.1.2
A catalysis-based regioselective 1,4-fluorofunctionalization of trifluoromethyl substituted 1,3-dienes has been developed to access compact, highly functionalized products. The platform has been extended to enable 1,4-hetero-difunctionalization, which allows δ-fluoro-alcohol and amine derivatives to be forged in a single operation.