The ene-reductases mediated bioreduction of a selection of open-chain α-alkyl-β-aryl enones afforded the corresponding saturated α-chiral ketones in high yield and optical purity in several cases. The stereo-electronic requirements of the reaction have been investigated, considering the nature and location of substituents on the aromatic ring as well as the steric hindrance at the α-position and adjacent
Disclosed are compounds having the ability to inhibit cytochrome P450 2A6, 2A13, and/or 2B6 and tobacco products comprising them. Also disclosed are pharmaceutical compositions comprising them.
1-Silylvinyl ketones undergo smooth Michael addition with Grignardreagents generating magnesium enolates which are then trapped with benzaldehyde to give E- and Z-isomers of enones after Peterson condensation. (E)-Olefins become major products under a thermodynamic control when the condensation with benzaldehyde is carried out at room temperature in diethylether, while Z-isomers are more favored
Highly Stereoselective Facile Synthesis of 2-Acetoxy-1,3(<i>E</i>)-alkadienes via a Rh(I)-Catalyzed Isomerization of 2,3-Allenyl Carboxylates
作者:Xiaobing Zhang、Chunling Fu、Shengming Ma
DOI:10.1021/ol200198z
日期:2011.4.15
A highly stereoselective Rh(I)-catalyzed 1,3-acetoxyl rearrangement of 1,2-allen-3-yl carboxylates leading to 2-acetoxy-1,3(E)-alkadienes has been developed. In addition to the high catalytic efficiency and the scope, the excellent E-selectivity of the double bond is remarkable.
Organic Compounds and Compositions Having the Ability to Modulate Fragrance Compositions
申请人:Schilling Boris
公开号:US20100111888A1
公开(公告)日:2010-05-06
Disclosed are compounds having the ability to modulate, namely to improve, enhance and or modify fragrance compositions due to their ability to inhibit cytochrome P450 enzymes, e.g. CYP2A13 and CYP2B6.