A new [3 + 4] cycloaddition of azaoxyallyl cations and anthranils has been achieved for rapid access to multisubstituted benzodiazepine derivatives. A variety of anthranils and α-halo hydroxamates were both effective substrates with simple operations under transition-metal-free conditions. The intriguing features of this method include its mild nature of the reaction conditions, high efficiency, broad
was developed, providing various α-cyano ketones, esters, and carboxamides containing a nitrile-bearing all-carbon quaternarycenter in good to excellent yields undermild reaction conditions. The corresponding reaction mechanism involving in situ generated organozinc reagent and reactivity distinction was elucidated by density functional theory computation.
Entwicklung potentieller Antiandrogene: N-(4-Nitro-3-trifluormethylphenyl)-cyclohexanoylamide und -benzamide, N-(3,4-Dichlorphenyl)- und N-(3,4,5-Trichlorphenyl)-benzamide
作者:Alfred W. Humm、Martin R. Schneider
DOI:10.1002/ardp.19883210710
日期:——
Zur Entwicklung potentieller nichtsteroidalerAntiandrogene wurden N‐(4‐Nitro‐3‐trifluormethylphenyl)‐cyclohexanoylamide und ‐benzamide, sowie N‐(3,4‐Dichlorphenyl)‐ und N‐(3,4,5‐Trichlorphenyl)‐benzamide synthetisiert. Die Hydroxycyclohexylverbindung 3 zeigte eine deutlich höhere Affinität zum Androgenrezeptor (AR) als Hydroxyflutamid. Der Ersatz des Hydroxycyclohexylringes durch einen Hydroxyphenylring
为了开发潜在的非甾体抗雄激素,N-(4-硝基-3-三氟甲基苯基)-环己酰胺和-苯甲酰胺,以及 N-(3,4-二氯苯基)和 N-(3,4,5-三氯苯基)-苯甲酰胺合成的。羟基环己基化合物 3 对雄激素受体 (AR) 的亲和力明显高于羟基氟他胺。用羟基苯环取代羟基环己基环导致 AR 亲和力急剧下降。测试了具有 AR 亲和力的化合物的抗雄激素和雄激素作用。
Oxonia-Cope Prins Cyclizations: A Facile Method for the Synthesis of Tetrahydropyranones Bearing Quaternary Centers
作者:Jackline E. Dalgard、Scott D. Rychnovsky
DOI:10.1021/ja044736y
日期:2004.12.1
of a more nucleophilic silyl enolether, such systems rearrange and cyclize to produce tetrahydropyranones. The substrates were prepared by silyl ketene acetal addition to ketenes. The rearrangement is compatible with tetrasubstituted silyl enolethers, which result in the diastereoselective introduction of quaternary centers at the C3 position of the tetrahydropyranring. The oxonia-Cope Prins rearrangement
Generation and Reactivity of Aza-Oxyallyl Cationic Intermediates: Aza-[4 + 3] Cycloaddition Reactions for Heterocycle Synthesis
作者:Christopher S. Jeffrey、Korry L. Barnes、John A. Eickhoff、Christopher R. Carson
DOI:10.1021/ja201901d
日期:2011.5.25
Aza-[4 + 3] cycloadditions of putative azaoxyallyl cationic intermediates and cyclic dienes are reported. The intermediate is generated by the dehydrohalogenation of alpha-haloamides. The reaction is general to a variety of alpha-haloamides and is diastereoselective. Computational and experimental data suggest that an N-alkoxy substituent stabilizes the aza-oxyallyl cationic intermediate.