Gold-Catalyzed Carbenoid Transfer Reactions of Diynes - Pinacol Rearrangement<i>versus</i>Retro-Buchner Reaction
作者:Tobias Lauterbach、Takafumi Higuchi、Matthias W. Hussong、Matthias Rudolph、Frank Rominger、Kazushi Mashima、A. Stephen K. Hashmi
DOI:10.1002/adsc.201400849
日期:2015.3.9
terminal propargylic acetate moiety and one tertiary propargylic alcohol subunit were converted in the presence of a gold catalyst. After an initial 1,2‐migration of the acetoxy group at the terminal alkyne, a gold carbenoid is formed which is then transferred onto the internal alkyne of the propargylic alcohol. This combination enables the use of propargylic acetates as precursors for a gold‐catalyzed
在金催化剂的存在下,将带有一个末端乙酸炔丙酯部分和一个叔炔丙醇亚单元的芳族二炔体系转化。在末端炔烃上乙酰氧基的最初1,2-迁移后,形成了金类胡萝卜素,然后将其转移到炔丙醇的内部炔烃上。这种结合可以使乙酸炔丙酯用作金催化的频哪醇型重排的前体。在最后的频哪醇样步骤中,烷基或芳基部分转移到亲电金类胡萝卜素/阳离子上终止了反应,并获得了1-萘基酮。如果使用富含电子的芳族主链,则会打开一个机械上令人感兴趣的替代途径,包括逆布氏反应。