Unexpected formation of 4,4-dimethyl-1,2-disubstituted-dicarbonyl cyclopentanes from ketone enolate anions and 1,3-diiodo-2,2-dimethylpropane
作者:Cecilia A. Barrionuevo、Luciana C. Schmidt、Juan E. Argüello
DOI:10.1039/c5nj03672k
日期:——
followed by subsequent double alkylation with bis-iodide yielding a cyclopentane adduct. This methodology allows the use of a simple potassium tert-butoxide as a base at room temperature for the formation of three C–C bonds resulting in a relatively complex five-membered ring diketone structure under transition-metal-free conditions.
Enantioselective Synthesis of Cyclopropanone Equivalents and Application to the Formation of Chiral β‐Lactams
作者:Christopher M. Poteat、Yujin Jang、Myunggi Jung、J. Drake Johnson、Rachel G. Williams、Vincent N. G. Lindsay
DOI:10.1002/anie.202006786
日期:2020.10.12
derivatives have long been considered unsustainable synthetic intermediates because of their extreme strain and kinetic instability. Reported here is the enantioselective synthesis of 1‐sulfonylcyclopropanols, as stable yet powerful equivalents of the corresponding cyclopropanone derivatives, by α‐hydroxylation of sulfonylcyclopropanes using a bis(silyl) peroxide as the electrophilic oxygen source. This
Structure-reactivity relations for thiol-disulfide interchange
作者:Janette Houk、George M. Whitesides
DOI:10.1021/ja00256a040
日期:1987.10
di- and trithiols and the disulfides derived from either 2-mercaptoethanol or dithiothreitol. Reactions were conducted in methanol-d,/aqueous buffer (pH 7) or methanold, at 25 "C, using NMR spectroscopy to follow the reactions. These data were used to rank the dithiols in terms of reduction potential and to infer the structure of the disulfides formed from them on oxidation. There is a general correlation
[EN] PYRAZOLE AMIDE DERIVATIVE<br/>[FR] DÉRIVÉ DE PYRAZOLE AMIDE
申请人:TEIJIN PHARMA LTD
公开号:WO2015129926A1
公开(公告)日:2015-09-03
The present invention relates to a novel compound having a function of inhibiting RORγ activity. The present invention also relates to pharmaceutical composition comprising the compound, a use of the compound in treating or preventing autoimmune diseases, inflammatory diseases, metabolic diseases, or cancer diseases.
1,2-Dibromotetrachloroethane: an efficient reagent for many transformations bymodified Appel reaction
作者:Selçuk EŞSİZ、Arif DAŞTAN
DOI:10.3906/kim-1804-41
日期:——
been developed for the synthesis of alkyl bromides from various alcohols under mild conditions using a triphenylphosphine (PPh$_3})$/1,2-dibromotetrachloroethane (DBTCE) complex in excellent yields and very short time (5 min). This method can also be applied for the transformation of chiral alcohols to their corresponding bromides in very high enantiomeric excess. The PPh$_3}$/DBTCE complex is also