Arylation and Vinylation of α-Diazocarbonyl Compounds with Boroxines
摘要:
An alternative approach for alpha-arylation and alpha-vinylation of carbonyl compounds is described: reaction between aryl- or vinylboroxines with alpha-diazocarbonyl compounds leads to the formation of alpha-arylated or alpha-vinylated carbonyl compounds under mild conditions.
据报道,前所未有的Mn I / Ag I中继催化(乙烯基)芳烃与α-重氮酮的C(sp 2)-H / C(sp 3)-H偶联,其中重氮基被用作无痕助剂控制区域选择性。具有挑战性的β-(杂)芳基/烯基酮是通过这种操作简单的方法获得的。级联过程合并了脱氮,卡宾重排,CH活化和加氢芳基化/加氢烯基化。该方法的鲁棒性已在制备规模上得到证明,并应用于天然产物的后期多样化。
Efficient palladium-catalyzed cross-coupling reactions of α-diazocarbonyl compounds and arylboronic acids or arylhalides have been developed. The reaction proceeds smoothly for a range of diazo compounds, boronic acids, and halides. The coupling reaction conditions tolerate various substituents on the aromatic rings of the substrates, such as chloro, fluoro, acyl, oxo, ester, and nitro groups. This