A new anionic cyclization reaction: Condensation of benzoate esters with nitriles to give 3-amino-2-inden-1-ones
作者:Nadim E. Kayaleh、Ramesh C. Gupta、John F. Morrissey、Francis Johnson
DOI:10.1016/s0040-4039(97)10181-2
日期:1997.11
β-oxonitriles undergo cyclization to give, in most instances, superior yields of the same compounds. Acid hydrolysis of these indenones leads in high yield to the corresponding biologically active (anticoagulant) indandiones.
The reaction of 2-(tetrazol-5-yl)alkyl ketones and of 2-(tetrazol-5-yl)alkanoic acid derivatives with lead tetraacetate. A novel method of preparation of alk-2-ynyl ketones and alk-2-ynoic acid derivatives †
The majority of tetrazolylacetyl derivatives 2 and 7, when treated with leadtetraacetate in dry 1,4-dioxane at room or lower temperature, are oxidized with elimination of molecular nitrogen mainly to the corresponding alkynoyl derivatives 4 and 8, respectively. Vinylidenes (25) have been shown to be the intermediates of the reaction. The reaction does not take place when either the tetrazolyl group
A cascade process for the straightforward one-pot conversion of β-ketonitriles into β-hydroxyamides is presented. The process, that proceeds in water employing the arene-ruthenium(II) complex [RuCl2(η6-p-cymene)P(4-C6H4F)2Cl}] as catalyst in combination with sodium formate, involves the initial hydration of the β-ketonitrile substrates to generate the corresponding β-ketoamide intermediates, which
提出了一种简单的一锅法将β-乙腈转化为β-羟酰胺的级联方法。的过程中,在水中进行采用芳烃-钌(II)络合物将[RuCl 2(η 6 - p -cymene)P(4-C 6 H ^ 4 F)2氯}]如甲酸钠催化剂组合该方法涉及β-酮腈底物的初始水合反应,以生成相应的β-酮酰胺中间体,然后对其进行羰基的转移氢化(TH)。雇用40个不同的β族-乙腈具有不同的取代模式,已经确定了该方法的范围和局限性。
Pyrazolo[1,5-a]pyrimidines as estrogen receptor ligands: defining the orientation of a novel heterocyclic core
作者:Dennis R. Compton、Kathryn E. Carlson、John A. Katzenellenbogen
DOI:10.1016/j.bmcl.2004.08.046
日期:2004.11
We have examined the pyrazolo[1,5-a]pyrimidine scaffold as a novel core structure for estrogenreceptorligands. Attachment of various substituents has helped to define the orientation of this heterocycle in the ligand-binding pocket as one in which a pendant phenol rather than the hydroxylpyrimidine serves as a mimic of the A-ring of estradiol.
Enantioselective Direct Amination
of α-Cyanoketones Catalyzed by Bifunctional Organocatalysts
作者:Dae Kim、Sun Kim、Ju Lee
DOI:10.1055/s-0028-1083510
日期:——
The catalytic enantioselective electrophilic α-amination promoted by chiral bifunctional organocatalysts is described. Treatment of α-cyanoketones with azodicarboxylates as electrophilic amination reagents under mild reaction conditions afforded the corresponding α-aminated α-cyanoketones with excellent enantiomeric excesses (87-99%).