Silyl trifluoromethanesulfonate-activated para-methoxybenzyl methyl ether as an alkylating agent for thiols and aryl ketones
作者:C. Wade Downey、Sarah E. Covington、Derek C. Obenschain、Evan Halliday、James T. Rague、Danielle N. Confair
DOI:10.1016/j.tetlet.2014.07.068
日期:2014.9
para-Methoxybenzyl methyl ether acts as an alkylatingagent for thiols in the presence of trimethylsilyl trifluoromethanesulfonate and trialkylamine base in good yields (58–96%). Aryl ketones are alkylated under similar conditions, probably through an enol silane intermediate, also in high yields (67–95%). The activealkylating species is likely a p-methoxybenzyl cation.
This article reports a mild protocol for visible-light-mediated Minisci-type C−H alkylation reactions of N-heteroarenes with 2-mercaptothiazolinium salts without using extra acids, furnishing the corresponding functionalized N-heteroarenes in good to high yields.