DDQ-Promoted Mild and Efficient Metal-Free Oxidative α-Cyanation of N-Acyl/Sulfonyl 1,2,3,4-Tetrahydroisoquinolines
作者:Hong Kim、Heesun Yu、Hyoungsu Kim、Seok-Ho Kim、Dongjoo Lee
DOI:10.3390/molecules23123223
日期:——
N-acyl/sulfonyl iminium ions with (n-Bu)3SnCN. Employing readily removable N-acyl/sulfonyl groups as protectinggroups rather than N-aryl ones enables a wide range of applications in natural product synthesis. The synthetic utility of the method was illustrated using a short and efficient formaltotalsynthesis of (±)-calycotomine in three steps.
Ezquerra, Jesus; Alvarez-Builla, Julio, Journal of Heterocyclic Chemistry, 1988, vol. 25, p. 917 - 925
作者:Ezquerra, Jesus、Alvarez-Builla, Julio
DOI:——
日期:——
Jackson, Yvette A.; Stephenson, E. Kyle; Cava, Michael P., Heterocycles, 1993, vol. 36, # 5, p. 1047 - 1050
作者:Jackson, Yvette A.、Stephenson, E. Kyle、Cava, Michael P.
DOI:——
日期:——
Synthesis of cis-2,3-Disubstituted Benzo[a]quinolizidin-4-ones via Reissert-Compounds
作者:Eberhard Reimann、Manfred Renz、Kurt Polborn
DOI:10.1007/s00706-006-0540-y
日期:2006.11
Isoquinolin-1-ylmethylfuranones could be readily prepared from certain Reissert-compounds and isopilopyl bromide by standard procedures. Their reduction to the desired not isolated 1,2,3,4-tetrahydroisoquinoline intermediates was achieved by chemical and/or catalytical hydrogenation, followed by intramolecular amidation conveniently giving the title compounds in a one-pot synthesis. The structures and the stereochemistry of the target compounds were assigned by C-13 NMR spectroscopy and X-ray diffraction analysis.
EZQUERRA, JESUS;ALVAREZ-BUILLA, JULIO, J. HETEROCYCL. CHEM., 25,(1988) N 3, C. 917-925