Photochemical Cycloaddition Reagents for Rigidly Attaching the 1,4-Dimethoxynaphthalene Chromophore to Scaffold Alkenes
摘要:
The norbornanecyclobutene epoxides 1a-1c containing a fused 1,4-dimethoxynaphthalene chromophore have been reacted with cyclobutenes, cyclohexenes, norbornenes, 7-isopropylidenenorbornenes, 7-azanorbornenes, and other cyclic or electron-deficient alkenes at room temperature to form 1:1 adducts in stereoselective 1,3-dipolar cycloaddition reactions; alkynes can also participate in this reaction, The ability to form 2:1 adducts has also been demonstrated, thereby opening up opportunities for preparing functionalized products with large chromophore separations.
The Synthesis of Rigid Chromophore–Spacer–Chromophore Dyads and Three-Armed Triads by the 1,3-Dipolar Reaction of Cyclobutene Epoxides with Aromatic Dipolarophiles
作者:Davor Margetić、Douglas Butler、Ronald Warrener
DOI:10.1055/s-0033-1340305
日期:——
dipolarophiles with ring-fused cyclobutene epoxides (CEs) in the 1,3-dipolarcycloaddition protocol to form 1:1 cycloadducts. The dihydroforms of the PAH chromophores contained in the rigid alicyclic scaffold were dehydrogenated to regenerate the original PAH chromophore and constituted a new route to rigid chromophore-nσ-PAH dyads separated by an alicyclic scaffold. The anthracene 1:1 adduct derived from the
Photochemical Cycloaddition Reagents for Rigidly Attaching the 1,4-Dimethoxynaphthalene Chromophore to Scaffold Alkenes
作者:Davor Margetic、Richard A. Russell、Ronald N. Warrener
DOI:10.1021/ol006571d
日期:2000.12.1
The norbornanecyclobutene epoxides 1a-1c containing a fused 1,4-dimethoxynaphthalene chromophore have been reacted with cyclobutenes, cyclohexenes, norbornenes, 7-isopropylidenenorbornenes, 7-azanorbornenes, and other cyclic or electron-deficient alkenes at room temperature to form 1:1 adducts in stereoselective 1,3-dipolar cycloaddition reactions; alkynes can also participate in this reaction, The ability to form 2:1 adducts has also been demonstrated, thereby opening up opportunities for preparing functionalized products with large chromophore separations.