Highly Convergent, Stereospecific Synthesis of 11-<i>cis</i>-Retinoids by Metal-Catalyzed Cross-Coupling Reactions of (<i>Z</i>)-1-Alkenylmetals
作者:Susana López、Javier Montenegro、Carlos Saá
DOI:10.1021/jo701664r
日期:2007.12.1
A stereospecific synthesis of 11-cis-retinoids has as its key step the hitherto unexplored palladium-catalyzed cross-coupling of trans-trienyl electrophiles and (1Z,3E)-penta-1,3-dienyl boronates (a Suzuki−Miyaura reaction) or stannanes (a Stille reaction). This highly convergent approach constitutes the first application of cis-organometallic moieties to the synthesis of 11-cis-retinoids and represents
A comprehensive survey of stille-type Csp2-Csp2 single bond forming processes in the synthesis of retinoic acid and analogs
作者:Beatriz Domínguez、Beatriz Iglesias、Angel R. de Lera
DOI:10.1016/s0040-4020(99)00962-x
日期:1999.12
coupling for the formation of the side-chain single bonds. On employing the experimental catalytic conditions developed by Farina [Pd2(dba)3, AsPh3, NMP] we have modified the electronic and steric requirement of the coupling parters, alkenyl stannanes and electrophiles (alkenyl iodides and triflates). The comprehensive survey afforded appropriately matched components for every bond formation considered.