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.
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.
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.
Halocycloalkenones as Diels–Alder Dienophiles. Applications to Generating Useful Structural Patterns
作者:Audrey G. Ross、Steven D. Townsend、Samuel J. Danishefsky
DOI:10.1021/jo302230m
日期:2013.1.4
are demonstrated to function as potent dienophiles in inter- and intramolecular Diels–Alder cycloadditions. We have found 2-brominated cycloalkenone dienophiles to be both highly endo selective and significantly more reactive than their nonhalogenated parent compounds. A method for the facile conversion of brominated cyclobutanone DA adducts to synthetically useful cyclopropyl functional handles is described
已证明卤代环烯酮在分子间和分子内 Diels-Alder 环加成反应中作为有效的亲二烯体发挥作用。我们发现 2-溴化环烯酮亲二烯体与它们的非卤化母体化合物相比具有高度的内选择性和显着更高的反应性。描述了一种将溴化环丁酮 DA 加合物轻松转化为合成有用的环丙基功能手柄的方法。