Generation of N-acyl iminium ions from ionization-rearrangement reactions of N-triflyloxy amides
摘要:
N-Triflyloxy amides undergo ionization in refluxing isopropanol to give N-acyliminium ions which can be trapped by addition of allyltrimethylsilane to the reaction mixture. Alternatively they can be converted to N-(isopropoxy)alkyl amides and then back to N-acyliminium ions under a variety of conditions.
Generation of N-acyl iminium ions from ionization-rearrangement reactions of N-triflyloxy amides
摘要:
N-Triflyloxy amides undergo ionization in refluxing isopropanol to give N-acyliminium ions which can be trapped by addition of allyltrimethylsilane to the reaction mixture. Alternatively they can be converted to N-(isopropoxy)alkyl amides and then back to N-acyliminium ions under a variety of conditions.
Hoffman Robert V., Nayyar Naresh K., J. Org. Chem, 59 (1994) N 13, S 3530-3539
作者:Hoffman Robert V., Nayyar Naresh K.
DOI:——
日期:——
Hoffman Robert V., Nayyar Naresh K., Shankweiler Jean M., Klinekole Bruce+, Tetrahedron Lett, 35 (1994) N 20, S 3231-3234
作者:Hoffman Robert V., Nayyar Naresh K., Shankweiler Jean M., Klinekole Bruce+
DOI:——
日期:——
A Facile Preparation of N-(Isopropoxyalkyl) Amides by Generation and Trapping of N-Acyliminium Ions from Ionization-Rearrangement Reactions of N-Triflyloxy Amides
作者:Robert V. Hoffman、Naresh K. Nayyar
DOI:10.1021/jo00092a007
日期:1994.7
A series of hydroxamic acids were converted to N-triflyloxy amides which were heated in 2-propanol to give N-(1-isopropoxyalkyl) amides in high yields. The method is simple, direct, and extremely tolerant of structural diversity both in the N-acyl group, as well as in the 1-isopropoxyalkyl group. N-Alkylation of secondary N-(1-isopropoxyalkyl) amides can be used for converting them to tertiary N-(1-isopropoxyalkyl) amides. N-Acyliminium ions of wide structural diversity can be generated easily from N-(1-isopropoxyalkyl) amides available by this methodology.
Generation of N-acyl iminium ions from ionization-rearrangement reactions of N-triflyloxy amides
作者:Robert V. Hoffman、Naresh K. Nayyar、Jean M. Shankweiler、Bruce W. Klinekole
DOI:10.1016/s0040-4039(00)76872-9
日期:1994.5
N-Triflyloxy amides undergo ionization in refluxing isopropanol to give N-acyliminium ions which can be trapped by addition of allyltrimethylsilane to the reaction mixture. Alternatively they can be converted to N-(isopropoxy)alkyl amides and then back to N-acyliminium ions under a variety of conditions.