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
作者:Muhammad Yar、Sven P. Fritz、Paul J. Gates、Eoghan M. McGarrigle、Varinder K. Aggarwal
DOI:10.1002/ejoc.201101272
日期:2012.1
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.
已经研究了在与二苯基乙烯基锍三氟甲磺酸盐的成环反应中 N-保护基团的性质对 1,2-氨基醇的影响。尽管甲苯磺酰基和亚磺酰胺基团以高产率提供吗啉,但使用 N-Cbz 导致 N-乙烯基恶唑烷酮的高产率合成。通过纳米喷雾 MS/MS 监测反应,这揭示了反应成功的原因以及不成功反应中反应中间体的命运。