Synthesis of N‐Vinyloxazolidinones and Morpholines from Amino Alcohols and Vinylsulfonium Salts: Analysis of the Outcome's Dependence on the N‐Protecting Group by Nanospray Mass Spectrometry

Abstract

AbstractThe effect of the nature of the N‐protecting group on 1,2‐amino alcohols in annulation reactions with diphenylvinylsulfonium triflate has been investigated. Although tosyl and sulfinamide groups give morpholines in high yields, the use of N‐Cbz leads to a high‐yielding synthesis of N‐vinyloxazolidinones. The reactions were monitored by nanospray MS/MS, which revealed why reactions are successful and the fate of reactive intermediates in the unsuccessful reactions.