Facile synthesis of norbornene–ethylene–vinyl acetate/vinyl alcohol multiblock copolymers by the olefin cross-metathesis of polynorbornene with poly(5-acetoxy-1-octenylene)

New norbornene−ethylene–vinyl acetate/vinyl alcohol multiblock copolymers are synthesized via the olefin cross-metathesis reaction of polynorbornene with poly(5-acetoxy-1-octenylene) followed by CC bond hydrogenation and acetoxy group deprotection.

Comparative Study of CBS-Q Calculated and Experimental pKa Values for Fluoro-Acetoxy Derivative

The pKa values were calculated for some acetoxy group molecules using CBS-Q method which is one of the Complete Basis Set methods to find accurate energies. The acetoxy group molecules were also planned by Quantitative Structure Activity Relationship (QSAR) to study their effect on paraoxonase1 activity. The results of this study showed a strong relationship, (R2=0.99) between the calculated and experimental pka, also showed correlations between the activity of the enzyme and some of the studied descriptors. Moreover, the results of the study revealed that by using the SPSS program, there is a correlation between LUMO, Softness, Nucleofugality and Electrofugality as dependent variables and Cal. pKa as an independent variable.

Acetic Anhydride Mediated Retro-Ene Reaction via a [4.4.3]Propel­lane Skeleton Intermediate Containing a Quaternary Ammonium Linkage

A novel retro-ene reaction via a [4.4.3]propellane intermediate containing a quaternary ammonium linkage was developed. The feature of this acetic anhydride mediated rearrangement includes the elimination of an acetoxy group at the C14 position and subsequent intramolecular nucleophilic addition of a nitrogen functional group to form an isolable ammonium salt intermediate. We clarified the reaction mechanism utilizing the deuterated derivative.

Stereoselective synthesis of (−)-desethyleburnamonine, (−)-vindeburnol and (−)-3-epitacamonine: observation of a substrate dependent diastereoselectivity reversal of an aldol reaction

(−)-Acetoxyglutarimide was used for synthesis of target compounds wherein an acetoxy group induced enantioselectivity and functioned as a source of ketones.

Crystal structure of 3-acetoxy-2-methylbenzoic acid

In the title molecule, C10H10O4, the carboxylic acid group is twisted by 11.37 (15)° from the plane of the benzene ring and the acetoxy group is twisted from this plane by 86.60 (17)°. In the crystal, molecules are linked by pairs of O—H...O hydrogen bonds, forming inversion dimers with the expectedR22(8) graph-set motif.

ROMP of acetoxy-substituted dicyclopentadiene to a linear polymer with a high Tg

The acetoxy group was introduced to polydicyclopentadiene via ROMP of acetoxy-substituted dicyclopentadiene resulting in a linear polydicyclopentadiene derivative with high Tg.