[EN] 2,3,7-TRIMETHYLOCT-6-ENYL ACETATE AND 3,7-DIMETHYL-2-METHYLENE-OCT-6-ENYL ACETATE AND DERIVATIVES THEREOF AND THEIR USE AS AROMA CHEMICALS<br/>[FR] ACÉTATE DE 2,3,7-TRIMÉTHYLOCT-6-ÉNYLE ET DE 3,7-DIMÉTHYL-2-MÉTHYLÈNE-OCT-6-ÉNYLE, LEURS DÉRIVÉS ET LEUR UTILISATION EN TANT QUE PRODUITS CHIMIQUES AROMATIQUES
申请人:BASF SE
公开号:WO2018206415A1
公开(公告)日:2018-11-15
The present invention relates to 2,3,7-Trimethyloct-6-enyl acetate and 3,7-dimethyl-2-methylene-oct-6-enyl acetate and derivatives thereof and their use as aroma chemicals.
Intermolecular Heck Coupling with Hindered Alkenes Directed by Potassium Carboxylates
作者:Tucker R. Huffman、Yebin Wu、Alexis Emmerich、Ryan A. Shenvi
DOI:10.1002/anie.201813233
日期:2019.2.18
Pd0 -catalyzed Mizoroki-Heck reactions traditionally exhibit poor reactivity with polysubstituted, unbiased alkenes. Intermolecular reactions with simple, all-carbon tetrasubstituted alkenes are unprecedented. Herein we report that pendant carboxylic acids, combined with bulky monophospine ligands on palladium, can direct the arylation of tri- and tetrasubstituted olefins. Quaternary carbons are established
Asymmetric synthesis of warfarin and its analogs catalyzed by <i>C</i><sub>2</sub>-symmetric squaramide-based primary diamines
作者:Sergei V. Kochetkov、Alexander S. Kucherenko、Sergei G. Zlotin
DOI:10.1039/c8ob01576g
日期:——
4-hydroxy-6-methyl-2H-pyran-2-one to α,β-unsaturated ketones. Both enantiomers of the anticoagulant warfarin and itsanalogs were prepared in up to 96% yield and with 96% ee. Recyclability of the developed catalysts and synthetic utility of the prepared Michael adducts for asymmetric synthesis of potential chiral medications via acylation reactions were demonstrated.
Dual Transition Metal Electrocatalysis: Direct Decarboxylative Alkenylation of Aliphatic Carboxylic Acids
作者:Jiaqing Lu、Yan Yao、Liubo Li、Niankai Fu
DOI:10.1021/jacs.3c08839
日期:2023.12.13
the reaction. This new alkenylation protocol has been successfully demonstrated in direct modification of naturally occurring complex acids and is amenable to the enantioselective decarboxylative alkenylation of arylacetic acid. Mechanistic studies, including a series of controlled experiments and cyclic voltammetry data, allow us to probe the key intermediates and the pathway of the reaction.
Compounds which are inhibitors of cholesterol biosynthesis (by inhibiting de novo squalene biosynthesis), and thus are useful as hypocholesterolemic agents and antiatherosclerotic agents are provided which have the structure
and analogs thereof, wherein R¹, R², R³ and R⁴ are the same or different and are H, lower alkyl, a metal ion or a prodrug ester;
R⁵ is H, halogen or lower alkyl;
Zq is substituted alkenyl, substituted alkynyl, mixed alkenyl-alkynyl or substituted phenylalkyl, or substituted biphenylalkyl, alkylphenylalkyl or alkyl, including all stereoisomers thereof.
New methods for using such compounds to inhibit cholesterol biosynthesis are also provided.