A Tin-Free Route to trans-Diels–Alder Motifs by Visible Light Photoredox Catalysis
摘要:
A tin-free trans-Diels-Alder paradigm for the stereoselective synthesis of trans-fused polycyclic systems was developed through the photocatalytic reductive dehalogenation of alpha-haloketones promoted by visible light. Good to excellent diastereoselectivities were observed in the stereoselective construction of trans-fused octalone derivatives under mild reaction conditions.
A new and general method to functionalize the C(sp3)–C(sp2) bond of alkyl and alkene linkages has been developed, leading to the dealkenylative generation of carbon-centered radicals that can be intercepted to undergo Ni-catalyzed C(sp3)–C(sp2) cross-coupling. This one-pot protocol leverages the easily procured alkene feedstocks for organic synthesis with excellent functional group compatibility without
A Straightforward Route to Functionalized <i>trans</i>-Diels−Alder Motifs
作者:Jun Hee Lee、Yandong Zhang、Samuel J. Danishefsky
DOI:10.1021/ja1073855
日期:2010.10.20
A sequence consisting of a Lewis acid-catalyzed Diels-Alder reaction on a 2-halocyclohexenone, followed by reductive alkylation, provides a route to trans-fused octalinones bearing angularmethyl groups with functionality corresponding to that which would have been possible from a trans-directed Diels-Alder reaction.
A Tin-Free Route to <i>trans</i>-Diels–Alder Motifs by Visible Light Photoredox Catalysis
作者:Jun Hee Lee、Sun-il Mho
DOI:10.1021/acs.joc.5b00041
日期:2015.3.20
A tin-free trans-Diels-Alder paradigm for the stereoselective synthesis of trans-fused polycyclic systems was developed through the photocatalytic reductive dehalogenation of alpha-haloketones promoted by visible light. Good to excellent diastereoselectivities were observed in the stereoselective construction of trans-fused octalone derivatives under mild reaction conditions.