Gold(I)-catalyzed double migration cascades toward (1E,3E)-dienes and naphthalenes
作者:Alexander S. Dudnik、Todd Schwier、Vladimir Gevorgyan
DOI:10.1016/j.tet.2008.10.109
日期:2009.2
A novel gold(I)-catalyzed cascade cycloisomerization of a variety of propargylic esters leading to unsymmetrically substituted naphthalenes has been developed. This domino process involves an unprecedented tandem sequence of 1,3- and 1,2-migrations of two substantially different migrating groups. It is believed that this transformation proceeds via formation of 1,3-diene intermediate or its equivalent
Triflic acid catalysed regioselective synthesis of substituted naphthalenes by benzannulation of carbonyls with alkynes
作者:Vanajakshi Gudla、Mokhamatam Sudheer、Chinthu Joginarayana Rao、Paul Douglas Sanasi、Venkateswara Rao Battula
DOI:10.1016/j.tet.2021.132214
日期:2021.6
An interesting and facile triflic acid catalysed annulation of α-aryl carbonyls with arylalkynes is presented for the regioselective synthesis of substitutednaphthalenes. The annulation reaction involves a sequence of electrophilic attack of carbonyl on arylalkyne and benzannulation catalysed by triflic acid. The present catalyst effects this transformation at room temperature itself. Intramolecular
Gold-Catalyzed Electrophilic Addition to Arylalkynes. A Facile Method for the Regioselective Synthesis of Substituted Naphthalenes
作者:Rengarajan Balamurugan、Vanajakshi Gudla
DOI:10.1021/ol900863d
日期:2009.7.16
An interesting gold-catalyzed electrophilic addition to arylalkyne to synthesize substitutednaphthalenes has been presented. Different metal hexafluoroantimonates have also been found to effect the transformation. Counter anion and oxo- and alkynophilicities of catalytic gold species might play an important role in this annulation reaction.