The Grob/Eschenmoser fragmentation of cycloalkanones bearing β-electron withdrawing groups: a general strategy to acyclic synthetic intermediates
作者:Judith Hierold、Tina Hsia、David W. Lupton
DOI:10.1039/c0ob00632g
日期:——
a β-electron withdrawing group to cycloalkanones allows facile C–C bond fragmentation. The reaction has been demonstrated with a large range of ring sizes, bearing various leaving and electron withdrawing groups, and using a variety of nitrogen and oxygen containing nucleophiles (>30 examples). The application of fragmentation products to the preparation of substituted γ-lactones has been demonstrated
A divergent synthesis of modular dendrimers via sequential C–C bond fragmentation thio-Michael addition
作者:Judith Hierold、Angus Gray-Weale、David W. Lupton
DOI:10.1039/c0cc02289f
日期:——
The CâC bond fragmentation of carbocycles has been developed as a new method for the divergent synthesis of dendrimers. The scope of this reaction was examined with the preparation of six first generation dendrimers from structurally diverse and readily available fragmentation precursors. By pairing the fragmentation with a thio-Michael reaction, the preparation of a [G4]-ene24 dendrimer has been achieved.
Hiong, Annales de Chimie (Cachan, France), 1942, vol. <11>17, p. 269,299,300
作者:Hiong
DOI:——
日期:——
A New Method for Constructing Quaternary Carbon Centres: Tandem Rhodium-Catalysed 1,4-Addition/Intramolecular Cyclisation
作者:Jérôme Le Nôtre、David van Mele、Christopher G. Frost
DOI:10.1002/adsc.200600355
日期:2007.2.5
1′-alkenes using arylzinc chlorides is described. The simple one-step synthesis of substituted cyclopentanone and cyclohexanone derivatives is performed from acyclic precursors using relatively low catalyst loadings under mild conditions. A new quaternary carbon centre is created during the cyclisation step.