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Design, Synthesis, Antifungal Evaluation, Structure-Activity Relationship (SAR) Study, and Molecular Docking of Novel Spirotryprostatin A Derivatives. [PDF]
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Studies towards the diastereoselective spiroannulation of phenolic derivatives
Tetrahedron Letters, 2002AbstractFor Abstract see ChemInform Abstract in Full Text.
Guy L Plourde
exaly +2 more sources
Cyclic Ketones in Spiroannulation
Synthetic Communications, 2009Abstract Conversion of a cyclic carbonyl carbon into a quaternary carbon has been effected by a Wittig–Horner reaction with diethyl (N-benzyliden)aminomethylphosphonate and a subsequent alkylation with a protected vinyl ketone. The product was a substrate for spiroannulation after initial hydrolysis.
Vidar Bj⊘rnstad, Kjell Undheim
exaly +2 more sources
Advanced Synthesis and Catalysis
Herein, a Rh‐catalyzed redox C7‐spiroannulation reaction of N‐benzo[d]imidazole indolines with maleimides has been reported, chemo‐ and regio‐ selectively providing a series of N‐benzo[d]imidazole indoline fused azaspirocycles in up to 92% yield.
Xiuling Cui, Yangjie Wu
exaly +2 more sources
Herein, a Rh‐catalyzed redox C7‐spiroannulation reaction of N‐benzo[d]imidazole indolines with maleimides has been reported, chemo‐ and regio‐ selectively providing a series of N‐benzo[d]imidazole indoline fused azaspirocycles in up to 92% yield.
Xiuling Cui, Yangjie Wu
exaly +2 more sources
Advanced Synthesis and Catalysis
Ru(II)‐catalyzed and solvent‐switched [3+2]‐spiroannulation and [4+n] (n=1, 2, 3) annulations of 2‐aryl quinazolinone or 2‐aryl‐2,3‐dihydrophthalazine‐1,4‐diones with ynones or alkynyl alcohol or 1,3‐diynes under mild reaction conditions have been ...
Asish R Das +2 more
exaly +2 more sources
Ru(II)‐catalyzed and solvent‐switched [3+2]‐spiroannulation and [4+n] (n=1, 2, 3) annulations of 2‐aryl quinazolinone or 2‐aryl‐2,3‐dihydrophthalazine‐1,4‐diones with ynones or alkynyl alcohol or 1,3‐diynes under mild reaction conditions have been ...
Asish R Das +2 more
exaly +2 more sources
Organic Letters
Herein, we report a cascade reaction to produce spirophthalide boronate frameworks efficiently. This protocol involves borylcupration as a cascade triggering reaction followed by intramolecular aldol reaction, hemiacetalization, and subsequent oxidation,
L. D. Khalse, P. B. Patil, P. Ghorai
semanticscholar +3 more sources
Herein, we report a cascade reaction to produce spirophthalide boronate frameworks efficiently. This protocol involves borylcupration as a cascade triggering reaction followed by intramolecular aldol reaction, hemiacetalization, and subsequent oxidation,
L. D. Khalse, P. B. Patil, P. Ghorai
semanticscholar +3 more sources
Dearomative [2 + 1] Spiroannulation of Bromophenols with Electron-Deficient Alkenes.
The Journal of Organic ChemistryA base-assisted dearomative [2 + 1] spiroannulation of p/o-bromophenols with activated olefins (methylenemalonates) to construct various cyclopropyl spirocyclohexadienone skeletons is reported. Furthermore, several other halophenols (X = Cl, I) were also
Ting Yang +5 more
semanticscholar +3 more sources
Dearomative Spiroannulation of Indoles Enabled by Diaza-[1,2]-Wittig Rearrangement
Organic Chemistry FrontiersThe first diaza-[1,2]-Wittig rearrangement enabled dearomative spiroannulation (DSA) reaction of indoles is reported. As opposed to the previous dearomtization approaches using C3-functionalized indoles, metal catalysis, and/or external oxidants, this ...
Can Luo +4 more
semanticscholar +2 more sources