NOUVELLES VOIES D'ACCES AUX 2-ETHOXYCARBONYLALLYLPHOSPHONATES
作者:Hédi Mrabet、Hédi Zantour
DOI:10.1080/10426500490257005
日期:2004.1
The Michaelis-Arbusov reaction (method A) and the nucleophilic addition of dialkylphosphites followed by Hoffman olefination (method B) represent two synthetic methods giving a variety of 2-ethoxycarbonylallyl-phosphonates 2, in good yields, from readily accessible ethyl 2-(N,N-dialkylaminomethyl) acrylates 1.
Facile 1,3-diaza-Claisen Rearrangements of Tertiary Allylic Amines Bearing an Electron-Deficient Alkene
作者:Rachel M. Aranha、Amy M. Bowser、Jose S. Madalengoitia
DOI:10.1021/ol802577z
日期:2009.2.5
Tertiary allylic amines with an electron-deficient alkene react with isocyanates and isothiocyanates to give highly substituted ureas and thioureas arising from formal1,3-diaza-Claisenrearrangements. Isocyanates and isothiocyanates with strong electron-withdrawing groups are more reactive. Similarly, the data suggest that a stronger electron-withdrawing substituent on the alkene favors a faster reaction
Unexpected rearrangements of rhodium carbenoids containing a pyrrolidin-1-yl group
作者:Julian Diehl、Reinhard Brückner
DOI:10.1016/j.tetlet.2014.02.132
日期:2014.4
generating the corresponding rhodium carbenoids. They were expected to insert into a CH bond of the pyrrolidine moiety but reacted differently. The ketone-substituted rhodium carbenoid underwent a Wolff rearrangement. The resulting ketene continued to react by lactamization and electrocyclic ring-opening and gave an acrylamide. The ester-substituted rhodium carbenoid underwent a [1.2]-shift of the (p