Continuous-flow catalytic hydrogenation of 3a,6-epoxyisoindoles
作者:V. P. Zaytsev、F. I. Zubkov、D. F. Mertsalov、D. N. Orlova、E. A. Sorokina、E. V. Nikitina、A. V. Varlamov
DOI:10.1007/s11172-015-0829-2
日期:2015.1
Selective catalytic (10% Pd/C) hydrogenation of the double bond in the oxabicyclo[2.2.1]heptene fragment of substituted fused 1-oxo-3a,6-epoxyisoindoles is described. A continuous-flow hydrogenation device that incorporates in situ hydrogen generation by electrolysis of water was used. Changing the hydrogen source from water to deuterium oxide provides possibility to synthesize deuterated oxoepoxyisoindolones. Hydrogenation is stereoselective to give exclusively exo-cis deuterated derivatives.
[3+2] Cycloaddition of o-nitrophenyl azide to 3a,6-epoxyisoindoles
作者:Vladimir P. Zaytsev、Dmitriy F. Mertsalov、Maryana A. Nadirova、Pavel V. Dorovatovskii、Victor N. Khrustalev、Elena A. Sorokina、Fedor I. Zubkov、Aleksey V. Varlamov
DOI:10.1007/s10593-018-2194-1
日期:2017.11
[3+2] Cycloaddition of o-nitrophenyl azide to the multiple bond of oxabicyclo[2.2.1]heptene moiety in substituted 3a,6-epoxyisoindoles was performed. The 1,3-dipolar addition reaction proceeded stereoselectively, producing a pair of isomeric cis-4,8a-epoxy[1,2,3]triazolo[4,5-e]isoindoles. This approach demonstrated synthetic access to isomeric epoxy-1,2,3-benzotriazoles fused with a γ-butyrolactam
在取代的3a,6-环氧异吲哚中,将邻硝基苯基叠氮化物[3 + 2]环加成到氧杂双环[2.2.1]庚烯部分的多重键上。1,3-偶极加成反应立体选择性地进行,产生一对异构的顺式-4,8a-环氧[1,2,3]三唑并[4,5- e ]异吲哚。该方法证明了合成方法可合成与γ-丁内酰胺部分稠合的环氧-1,2,3-苯并三唑异构体。
Chiral acetylenic sulfoxides in organic synthesis: Secondary amine cyclization and total synthesis of (S)-(−)-carnegine
作者:Winghong Chan、Albert W.M. Lee、Lasheng Jiang
DOI:10.1016/0040-4039(94)02323-4
日期:1995.1
Michael addition of secondary amines 1b–1g onto chiralacetylenicsulfoxides 2 followed by acid induced cyclization afforded structures of tetrahydroisoquinoline skeleton in high to moderate diastereoselectivity. Optical pure (S)-(−)-carnegine has been synthesized.