Synthesis of 4-Methyldienoates Using a Vinylogous Horner−Wadsworth−Emmons Reagent. Application to the Synthesis of Trichostatic Acid
作者:John T. Markiewicz、Douglas J. Schauer、Joakim Löfstedt、Steven J. Corden、Olaf Wiest、Paul Helquist
DOI:10.1021/jo902422y
日期:2010.3.19
The utility of the unsaturatedphosphonate 1 as a vinylogous Horner−Wadsworth−Emmons reagent was explored in reactions with aldehydes affording 4-methyldienoate esters. Factors that affect E/Z selectivity were studied. A simplified synthesis of trichostatic acid 3 was accomplished to demonstrate utility of this reagent.
1,3-Dipolar cycloadditions of cyclic nitrones to γ-bromo α,β-unsaturated esters and lactones
作者:Pedro de March、Marta Figueredo、Josep Font、Antonio Salgado
DOI:10.1016/s0040-4020(98)00376-7
日期:1998.6
The 1,3-dipolar cycloaddition of cyclic nitrones to several γ-bromo α,β-unsaturatedesters and lactones has been studied. All the reactions have shown high stereoselectivity, with a predominance of the endo or exo transition state for the trans or cis dipolarophiles, respectively.
Thienopyrroles and pyrrolothiazoles as new therapeutic agents
申请人:Bonafoux Dominique F.
公开号:US20090209609A1
公开(公告)日:2009-08-20
The present invention is directed to novel compounds of Formula (I)
wherein the variables are defined as herein. The compounds of Formula (I) are useful as CRTH2 antagonists and as such would be useful in treating certain conditions and diseases, especially asthma, allergic asthma, allergic inflammation, rhinitis, allergic rhinitis or atopic dermatitis.
Fluorophenoxyphenoxypropionates and derivatives thereof
申请人:The Dow Chemical Company
公开号:US04642338A1
公开(公告)日:1987-02-10
Novel intermediates useful in the preparation of fluorophenoxyphenoxypropionates and derivatives thereof which possess herbicidal activity selectively in the presence of broadleaf crops.