HYDROXYMETHYL PYRROLIDINES AS BETA 3 ADRENERGIC RECEPTOR AGONISTS
申请人:Berger Richard
公开号:US20090253705A1
公开(公告)日:2009-10-08
The present invention provides compounds of Formula (I), pharmaceutical compositions thereof, and method of using the same in the treatment or prevention of diseases mediated by the activation of β3-adrenoceptor.
Iron-Catalyzed Ring-Opening Reactions of Cyclopropanols with Alkenes and TBHP: Synthesis of 5-Oxo Peroxides
作者:Chenhao Lou、Xin Wang、Leiyang Lv、Zhiping Li
DOI:10.1021/acs.orglett.1c02824
日期:2021.10.1
rarely used in multicomponent reactions. Herein we report the three-component reaction of cyclopropanols with alkenes and tert-butyl hydroperoxide (TBHP) catalyzed by an iron catalyst. This protocol enables the incorporation of both the β-carbonyl fragment and a peroxy unit across the C═C double bond regioselectively, thus allowing an efficient, facile access to 5-oxo peroxides. Modification of the biologically
Synthesis of α-fluoro-β-hydroxy esters by an enantioselective Reformatsky-type reaction
作者:Michal Fornalczyk、Kuldip Singh、Alison M. Stuart
DOI:10.1039/c2cc17985g
日期:——
The first enantioselective Reformatsky-type reaction of ethyl iodofluoroacetate has been accomplished with alkyl aryl ketones. High diastereoselectivities and excellent enantioselectivities for the major diastereomer (93â95% ee) were achieved with large alkyl groups. For smaller alkyl groups the diastereoselectivities were moderate, but excellent enantioselectivities were obtained for both diastereomers (79â94% ee).
Oxidative rearrangement of alkenes using in situ generated hypervalent iodine(III)
作者:Anees Ahmad、Paulo Scarassati、Nazli Jalalian、Berit Olofsson、Luiz F. Silva
DOI:10.1016/j.tetlet.2013.08.012
日期:2013.10
A novel protocol for the oxidativerearrangement of alkenes using in situ generated hypervalent iodine(III) was developed. This approach uses inexpensive, readily available, and stable chemicals (PhI, mCPBA, and TsOH) giving rearrangement products in yields comparable to those obtained using the more expensive commercially available [hydroxy(tosyloxy)iodo]benzene [HTIB or Koser’s reagent]. Additionally
Electrophilic alkynylation of ketones using hypervalent iodine
作者:Aline Utaka、Livia N. Cavalcanti、Luiz F. Silva
DOI:10.1039/c4cc00608a
日期:——
hypervalent iodine under mild and metal-free conditions. Carbonyl compounds containing an alpha-acetylene group were obtained in good to excellent yields for several ketones using 1-[(trimethylsilyl)ethynyl]-1,2-benziodoxol-3(1H)-one (TMS-EBX) as an alkynylation agent in the presence of t-BuOK and TBAF in THF as solvent. Under the same conditions, an aldehyde was alkynylated.