To achieve the overall aim of the proposed project, The research program is composed of four distinct but complementary research lines aiming at catalytic asymmetric dearomatisation/carbon-carbon bond forming reactions using: - electron-deficient carbonyl substituted arenes.- pyridines and other n-containing heteroarenes.- phenols and anilines and fused analogues.- benzylic
As a result, a benzylic
carbon radical intermediate might be produced, which, after rearrangement, could form an irreversible complex with the enzyme.
and pyridinium head groups controlled surfactant-polymer aggregates of mixed cationic micelles and anionic polyelectrolytes," Colloid and Polymer Science, vol.
The 4-bromobenzyl moiety in the molecule was corroborated by an A 2 B 2 spin system represented by two ortho-coupled doublets at I' 7.38 (br.d, J = 8.0 Hz, 2H, H-3'' and H-5'') and 7.12 (br.d, J = 8.4 Hz, 2H, H-2'' and H-6'') in the aromatic region of its 1 H-NMR spectrum along with a benzylic
methylene singlet at I' 4.69 (s, 2H, CH 2 -7'').
(23) released that benzylic
proton (Ar-CH=C) of 4-(2-chloro-4,5-dimethoxybenzylidene)-2-methyl-5-oxazolone was at 6.91 ppm and that if there were only one signal for the benzylic
proton, this showed that Z-isomer existed.
A comparative study of the catalysts towards the oxidation of secondary benzylic
alcohols to the corresponding ketones was carried out employing molecular [O.sub.2] as green oxidizing agent and the results obtained were also compared with the results of the oxidation of primary alcohols and based on this detailed investigation some inferences have been drawn.
Chemical shift/ppm Assignments 9.7-9.9 Cinamaldehydes and benzaldehydes 6.7-7.1 Aromatic-H in guaiacyl 6.2-6.7 Aromatic-H in syringyl 5.8-6.2 Benzylic
OH in [beta]-O-4 and [beta]-1 4.9-5.1 Carbohydrates 3.3-4.0 Methoxyl 3.0-3.1 [H.sub.[beta]] in [beta]-1 2.2-2.4 Phenolic OH 1.6-2.2 Aliphatic OH Table 4: Assignments of signals in 13C NMR spectrum to functional groups in lignin [31, 38, 49, 71].
The At4g39230 gene encodes a protein sequence that is similar to phenylcoumaran benzylic
ether reductase and has been found to influence the levels of flavonoids .
The 1H-NMR range demonstrated the frequency of two singlets at 3.60 and 4.36 due to the N-C[H.sub.3] and benzylic
methylene protons, respectively.
The methylol group of the hydroxylmethylolated cardanol, being unstable under acidic conditions, would lose water readily to form a benzylic
The MSD system is a rational approach to controlling crosslinking rates and yields , It is based on the trapping of macro-radicals by C=C addition to give a benzylic
radical that is susceptible to fragmentation (Scheme 6) [24, 25].
Deshpande developed polymers with allylic or benzylic
amide groups covalently bonded to the polymer molecules.