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.
We have developed an efficient Lewis acid-catalyzed Diels–Alderroute to a series of cis-fused bicyclic ketones bearing quaternary halogenation at the angular position. We have also developed a Diels–Alder-based one-flask method for the regioselective preparation of TBS-protected 6-hydroxy tetralone and 5-hydroxy indanone derivatives.
Diels-Alder reactions of 2-bromo-2-cycloalkenones. A convenient approach to the doubly cisoid fully conjugated dienone system
作者:Hsing-Jang Liu、Kak-Shan Shia
DOI:10.1016/0040-4039(95)00151-2
日期:1995.3
Under stannic chloride catalysis, 2-bromo-2-cycloalkenones 1 and 2 were found to undergo Diels-Alderreaction with dienes to give adducts in high yields. Subsequent treatment of the adducts with 1,8-diazabicyclo[5.4.0]undec-7-ene gave the corresponding doublycisoidfullyconjugateddienones.