Gold- and Silver-Catalyzed Reactions of Propargylic Alcohols in the Presence of Protic Additives
作者:Matthew N. Pennell、Peter G. Turner、Tom D. Sheppard
DOI:10.1002/chem.201102830
日期:2012.4.10
secondary and tertiary propargylic alcohols undergo a Meyer–Schuster rearrangement to give enones at room temperature in the presence of a gold(I) catalyst and small quantities of MeOH or 4‐methoxyphenylboronic acid. The syntheses of the enone natural products isoegomaketone and daphenone were achieved using this reaction as the key step. The rearrangement of primary propargylic alcohols can readily be combined
在室温下,在金(I)催化剂和少量MeOH或4-甲氧基苯基硼酸的存在下,大范围的伯,仲和叔炔丙醇会进行Meyer-Schuster重排,从而得到烯酮。以该反应为关键步骤,实现了烯酮天然产物异麦角酮和达芬酮的合成。伯炔丙醇的重排可以很容易地在单锅法中结合,向所得的末端烯酮中添加亲核试剂,得到β-芳基,β-烷氧基,β-氨基或β-硫代酮。带有相邻的富电子芳基的炔丙醇也可以通过氧,氮和碳亲核试剂进行银催化的醇取代。