Metal-Free Domino Oligocyclization Reactions of Enynals and Enynones with Molecular Oxygen.
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DOI: 10.1021/acs.orglett.0c04272
Abstract: A novel metal-free direct addition of molecular oxygen to the C-C triple bond toward benzannulated oxygen-bridged seven-membered ring systems and aza[3.1.0]bicycle skeletons under 3O2 atmosphere has been described. The reaction proceeds through at least three… read more here.
Keywords: oxygen; domino oligocyclization; molecular oxygen; free domino ... See more keywords
One-Pot Catalyst-Free Domino Condensation/Intramolecular 1,3-Dipolar Cycloaddition: Highly Stereoselective Access to Phosphadihydrocoumarin-Fused N,N-Bicyclic Pyrazolidin-3-ones
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DOI: 10.1055/s-0036-1590896
Abstract: A concise, atom-economic, and highly regio/stereoselective synthetic strategy was developed for the construction of phosphorus- and nitrogen-fused polycyclic skeleton derivatives. The one-pot, two-step, catalyst-free domino condensation/intramolecular cycloaddition reaction of various substituted 2-(vinylphosphoryloxy)benzaldehydes with pyrazolidin-3-one took… read more here.
Keywords: free domino; domino condensation; one pot; catalyst free ... See more keywords
Facile Protocols towards C2-Arylated Benzoxazoles using Fe(III)-Catalyzed C(sp2-H) Functionalization and Metal-Free Domino Approach
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DOI: 10.1055/s-0037-1609718
Abstract: Considering their growing attention in the field of medicinal chemistry and drug-discovery research, the facile and convenient approaches towards the preparation of 2-aryl benzoxazole derivatives have been described. The transformation is accomplished by using Fe(III)-catalyzed… read more here.
Keywords: free domino; iii catalyzed; using iii; metal free ... See more keywords