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.
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
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.