Front Cover Picture: Enantioselective Construction of Cyclic Enaminone-Based 3-Substituted 3-Amino-2-oxindole ScaffoldsviaCatalytic Asymmetric Additions of Isatin-Derived Imines (Adv. Synth. Catal. 19/2016)
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چکیده
منابع مشابه
Chitosan Aerogel Catalyzed Asymmetric Aldol Reaction in Water: Highly Enantioselective Construction of 3-Substituted-3-hydroxy-2-oxindoles
A chitosan aerogel catalyzed asymmetric aldol reaction of ketones with isatins in the presence of water is described. This protocol was found to be environmentally benign, because it proceeds smoothly in water and the corresponding aldol products were obtained in excellent yields with good enantioselectivities.
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Most workers have found that oxindoles are inactive as auxins or as auxin antagonists. For example, Thimann (44) working with straight growth of Az'ena coleoptile cylinders anid Pisitm stem sectiolns, and with growth curvature of slit Pistni stem sections, found the following 6 compounds to be without effect at concentraticns up to 30 mg/liter, both in the absence and presence of IAA at concent...
متن کاملExpedient access to substituted 3-amino-2-cyclopentenones by dirhodium-catalyzed [3+2]-annulation of silylated ketene imines and enoldiazoacetates.
In a reaction that proceeds under mild conditions with remarkable functional group tolerance, structurally diverse 3-amino-2-cyclopentenones bearing a quaternary carbon at the 4-position have been synthesized through a formal [3+2]-cycloaddition reaction of silylated ketene imines (SKIs) and enoldiazoaceates by dirhodium catalysis.
متن کاملPhosphine-catalyzed [3 + 2] cycloaddition of Morita-Baylis-Hillman carbonates with sulfamate-derived cyclic imines.
Phosphine-catalyzed [3 + 2] cycloaddition of Morita-Baylis-Hillman carbonates with sulfamate-derived cyclic imines has been developed, affording sulfamate-fused dihydropyrroles in moderate to good yields.
متن کاملDioxindole in asymmetric catalytic synthesis: direct access to 3-substituted 3-hydroxy-2-oxindoles via 1,4-additions to nitroalkenes.
The asymmetric Michael addition of dioxindoles to β-substituted nitroalkenes is reported. The bifunctional primary amine-thiourea A, by means of a non-covalent-based mode of catalysis, secures direct access to 3-substituted 3-hydroxyoxindole derivatives with high stereocontrol.
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ژورنال
عنوان ژورنال: Advanced Synthesis & Catalysis
سال: 2016
ISSN: 1615-4150
DOI: 10.1002/adsc.201601023