Rh(<scp>iii</scp>)-catalyzed [5+1] oxidative cycloaddition of arylguanidines with alkynes: a novel access to C4-disubstituted 1,4-dihydroquinazolin-2-amines
作者:Ana Cajaraville、Jaime Suárez、Susana López、Jesús A. Varela、Carlos Saá
DOI:10.1039/c5cc06388d
日期:——
The novel and mild RhIII-catalyzed [5+1] oxidative cycloaddition between arylguanidines and alkynes efficiently affords C4-disubstituted 1,4-dihydroquinazolin-2-amines. Members of this family of heterocycles, which contain the relevant cyclic guanidine units, have...
Novel, stereoselective tricyclization of a dienyne by titanium aryloxide centers
作者:Richard A. Himes、Phillip E. Fanwick、Ian P. Rothwell
DOI:10.1039/b209889j
日期:——
Titanium centers supported by aryloxide ligation mediate the tricyclization of a dienyne via intramolecular insertion of an olefin into the titanium–vinyl bond of a titanacyclopent-2-ene.