direct conversion of alkenes to cyclic guanidines, we report that 1,3-dipolar cycloadditions of 2-amido-1,3-diamino allylic cations with alkenes provide a new method for direct cyclic guanidine annulation. Generated under oxidative conditions, the 2-amido-1,3-diaminoallyl cations react as 1,3-dipoles providing rapid access to 2-amino imidazolines through net (3 + 2) cycloadditions. The utility is demonstrated
1,4-Diamination of Cyclic Dienes via a (4 + 3) Cycloaddition of Diaza-allyl Cationic Intermediates
作者:Christopher S. Jeffrey、Devendar Anumandla、Christopher R. Carson
DOI:10.1021/ol302771z
日期:2012.11.16
Diaza-(4 + 3) cycloadditions of putative diaza-oxyallyl cationic intermediates and cyclic dienes are reported as a method for the 1,4-diamination of cyclic dienes. This reaction was entirely selective for diamination and provided cycloadducts in good to excellent yield.
Preparation and properties of some novel diaminotetra(fluoroalkoxy)-triphosphonitriles
作者:M. V. Lenton、B. Lewis
DOI:10.1039/j19660000665
日期:——
The preparation and properties of a series of diaminotetra(fluoroalkoxy)triphosphonitriles is described. These novel compounds undergo condensation polymerisation with fluorinated polymethylene α,ω-glycols to yield thermally stable elastomeric materials.