TEMPO-substituted b-keto esters containing sterically different substituents
subjected to the tan-dem reaction afford the corresponding in-dole-containing tertiary alcohol in good to excellent yields (compounds 26~29, 31) under optimized con-ditions.
The birefringence properties of the molecular structure of methacrylate polymers, with the exception of the ester substituent
, are expected to be located near PMMA in the birefringence map because the [[gamma].
We also evaluated cellulose tribenzoate derivatives with various substituents
on the phenyl groups, and found that tris(4-methylbenzoate) showed a much better chiral recognition than cellulose tribenzoate to many racemates.
This high value implies that, when R = phenyl, the substituent
and the pyrogallol ring may not rotate around that bond and remain in their original positions with respect to the bond as the compound is assembled.
groups include methyl, phenyl and trifluoropropyl.
Synthesis, X-ray structures, and remarkable substituent
effects on electronic spectra.
For these experimental conditions, 56 different reaction paths are possible which result in 10 chemically distinct final products, four of which have zero TPG substituents
, four have one TPG substituent
, and two have two TPG substituents
VP Si 363 is characterized by a free mercapto group on the rubber-active site and a combination of ethoxy groups and polymeric, amphiphilic substituents
on the silica-active site.
These bridges connect some elementary substituent
with the reaction centre.
has been granted a patent for a process for preparing a polymer-modified pigment which is comprised of combining, in any order, at least one pigment having attached at least one nucleophilic group comprising a group having the formula X-Sp-[PA], at least one polymer comprising at least one carboxylic acid group or salt thereof, and at least one coupling agent, wherein X, which is directly attached to the pigment, represents an arylene, heteroarylene, or alkylene group, Sp represents a spacer group, and PA represents a polyamine group, a salt thereof, or an acyl derivative thereof, and wherein PA further comprises at least one substituent
group attached to the pigment.
groups can be located on the phenyl ring or/and the imidazole ring.
to formal training, on the job capacity building of all market stakeholders will be