Gold-Catalyzed Annulation/Fragmentation: Formation of Free Gold Carbenes by Retro-Cyclopropanation
作者:César R. Solorio-Alvarado、Antonio M. Echavarren
DOI:10.1021/ja104743k
日期:2010.9.1
The gold(I)-catalyzed cyclization of 1-(prop-2-yn-1-yl)-2-alkenylbenzenes substituted at the benzylic position with OR groups gives 1,3-disubstituted naphthalenes with concomitant fragmentation of the alkene. One of these annulations proceeds by a retro-cyclopropanation that leads to free gold(I) carbenes.
Palladium-Catalyzed Domino Carbopalladation/C–H Activation for the Synthesis of Tetrasubstituted Alkenes Bearing Five- and Seven-Membered Rings
A Pd-catalyzed domino carbopalladation/C-H-activation reaction of phenoxyphenyl-substituted propargylic alcohols was used for the synthesis of tetrasubstituted alkenes bearing either a dihydroindene or benzo[7] annulene motif. These compounds are of interest for the construction of molecular switches and motors.
CuCN-Mediated Cascade Cyclization of 4-(2-Bromophenyl)-2-butenoates: A High-Yield Synthesis of Substituted Naphthalene Amino Esters
作者:R. Santhosh Reddy、Pragati K Prasad、Brij Bhushan Ahuja、Arumugam Sudalai
DOI:10.1021/jo400244h
日期:2013.5.17
A new method of CuCN-mediated one-pot cyclization of 4-(2-bromophenyl)-2-butenoates leading to efficient synthesis of substituted naphthalene amino esters including phenanthrene aromatic structural units is described. Deuterium labeling studies establish that this one-pot cascade cyclization proceeds through isomerization of olefin, intramolecular C-C bond cyclization, and aromatization as the key intermediates, all occurring in a single step.
N-(PYRIDINYLAMINO)ISOINDOLINES AND RELATED COMPOUNDS