Arbeiten über Phosphorsäure- und Thiophosphorsäureester mit einem heterocyclischen Substituenten. 8. Mitteilung. Das<i>Stäubli</i>-Verfahren, eine Eintopf-Kondensation von Thiophosphorverbindungen (, XO,S), Aldehyden und Heterocyclen (mit saurer NH-Gruppe)
作者:Kurt Rüfenacht
DOI:10.1002/hlca.19740570619
日期:——
The condensation reaction of thiophosphoric compounds 1, aldehydes and heterocycles 3 with an acidic NH-group in strong mineral acid of specific concentration to asymmetrical compounds 4, called Stäubli procedure, differs from the Mannich-type reaction catalyzed by weak or dilute acid (aminoalkylation of Hellmann & Opitz) and from the Tscherniac-Einhorn-type condensation in concentrated sulfuric acid
Interrupted Oligomerization Revisited: Simple and Efficient One-Pot Multicomponent Approach to Versatile Synthetic Intermediates
作者:Roman A. Valiulin、Logan M. Halliburton、Andrei G. Kutateladze
DOI:10.1021/ol701847b
日期:2007.9.1
multicomponent reaction allowing for a one-pot formation of three carbon-carbon bonds has been developed. It is based on in situ generation and anionic dimerization of methylenedithiane and produces a versatilesynthetic equivalent of 4-hydroxy-1,3-alkanediones which, among other things, offers expeditious one-pot access to 3(2H)-furanones.