Lewis acid-catalyzed formation of Ugi four-component reaction product from Passerini three-component reaction system without an added amine
作者:Wei-Min Dai、Huoming Li
DOI:10.1016/j.tet.2007.10.050
日期:2007.12
In the presence of a Lewis acid the phenol-Passerini three-component reaction (phenol-P-3CR) system is found to deliver a product of the phenol-Ugi four-componentreaction (phenol-U-4CR). It is the first demonstration of an isocyanide as an amine equivalent in isocyanide-based multicomponent reactions (IMCRs). In general, by using Ti(O-i-Pr)4 in MeOH both phenol-U-4CR and U-4CR products are synthesized
Base-promoted reaction of O-sulfonylated hydroxamic acids with nucleophiles. A new method for the synthesis of .alpha.-substituted amides
作者:Robert V. Hoffman、Naresh K. Nayyar、Wenting Chen
DOI:10.1021/jo00047a024
日期:1992.10
Treatment of a series of hydroxamic acids 2 with mesyl chloride in the presence of 2 equiv of triethylamine at 0-degrees-C gives 2-chloroamides 3 in good yields. Use of a single equivalent of triethylamine gives the (N-mesyl-oxy)amides 1, which are versatile synthetic intermediates as they can be readily converted to 2-bromoamides 4 with lithium bromide and triethylamine and to 2-hydroxyamides 5 with triethylamine in aqueous acetonitrile.
Moderhack,D., Justus Liebigs Annalen der Chemie, 1973, p. 359 - 364
作者:Moderhack,D.
DOI:——
日期:——
Efficient conversion of O-sulfonylated arylacetohydroxamic acids to 2-substituted secondary amides
作者:Robert V. Hoffman、Naresh K. Nayyar、Bruce W. Klinekole
DOI:10.1021/ja00041a064
日期:1992.7
MESTRES, R.;PALOMO, C., SYNTHESIS, BRD, 1982, N 4, 288-291