Palladium-catalyzed enolate arylation as a key C–C bond-forming reaction for the synthesis of isoquinolines
作者:Ben S. Pilgrim、Alice E. Gatland、Carlos H. A. Esteves、Charlie T. McTernan、Geraint R. Jones、Matthew R. Tatton、Panayiotis A. Procopiou、Timothy J. Donohoe
DOI:10.1039/c5ob02320c
日期:——
those that give rise to the traditionally difficult to access electron-deficient isoquinoline skeletons. These two synthetic operations can be combined to give a three-component, one-pot isoquinoline synthesis. Alternatively, cyclization of the intermediates with hydroxylamine hydrochloride engenders direct access to isoquinoline N-oxides; and cyclization with methylamine, gives isoquinolinium salts. Significant
A room-temperature protocol to access isoquinolines through Ag(<scp>i</scp>) catalysed annulation of o-(1-alkynyl)arylaldehydes and ketones with NH<sub>4</sub>OAc: elaboration to berberine and palmatine
作者:Virsinha Reddy、Abhijeet S. Jadhav、Ramasamy Vijaya Anand
DOI:10.1039/c4ob02641a
日期:——
A silver catalysed protocol for the synthesis of a wide range of isoquinolines from o-(1-alkynyl)arylaldehydes has been developed under mild conditions and elaborated to the synthesis of berberine and palmatine.
Isoquinoline Synthesis by Heterocyclization of Tosylmethyl Isocyanide Derivatives: Total Synthesis of Mansouramycin B
作者:Anna Coppola、David Sucunza、Carolina Burgos、Juan J. Vaquero
DOI:10.1021/ol5032624
日期:2015.1.2
A new method for the synthesis of isoquinolines through a catalytic acid-mediated cyclization of α-benzyl TosMIC derivatives has been developed. This methodology has been successfully applied to the totalsynthesis of mansouramycin B. This is the first totalsynthesis of this compound to be reported in the literature.
realized via tandem reduction and rearrangement. Using TMSOK as the catalyst and (EtO)2MeSiH as the reductant, a series of cyclic imides containing different functional groups were reduced to the corresponding 3-aryl isoquinolines in moderate to good yields. The scenario of the reaction pathway was supposed to involve the reduction of imides to ω-hydroxylactams, which underwent rearrangement in the presence
Cobalt‐Mediated Decarboxylative/Desilylative C−H Activation/Annulation Reaction: An Efficient Approach to Natural Alkaloids and New Structural Analogues
A Co(II)- mediated decarboxylative/desilylative C−H activation/annulation reaction for the synthesis of 3-arylisoquinoline derivatives has been developed with a good functional group tolerance and wide applications.