Page 166 - CW E-Magazine (26-3-2024)

Special Report

with different Co loadings were studied used for mono and diesters of isoman- KL was oxidised in alkaline media at
and fully characterised. SAL was the nide and isoidide. Alkyl, vinyl, and aryl 30-60°C. The use of H O was also
2
2
main product; the other minor products esters were made at 180°C. (Ind. Eng. explored. Different analytic methods
were heptadecane; octadecane and Chem. Res., 2023; DOI: 10.1021/acs. were used for this study. Suitable condi-
stearyl stearate. (Applied Catalysis A: iecr.3C01915). tions are given for making nanoparticles.
General, 2023, 666, 25 Sep., 119437; (Green Chem., 2023; DOI: 10.1039/
DOI: 10.1016/j.apcata.2023.119437). Clean synthetic strategies to bio- D3GC01037F).
logically active molecules from
Prediction of intensifi ed ethanol lignin (L): A green path to drug Hemicellulosic sugars and
(E) fermentation of sugarcane discovery lignin (L): A synergistic com-
using a deep learning soft sen- bination for the synthesis of
sor and process analytic tech- A.M. Afnanasenko et al have stressed high-performance bioresins
nology (PAT) the importance of economic feasibility
of modern biorefi neries. These authors P.G. Falireas et al have demonstrated
E.C. Rivera et al have referred to inten- have adopted multi-disciplinary the valorisation of L and sugars, both
sifi ed E fermentation, which produces approach that combine research in L-fi rst obtained through dilute acid solvolysis
higher E concentrations while reducing biorefi ning, sustainable catalysis, and of lignocellulosic biomass, for the pro-
water and energy requirements. This alternative solvents with bioactivity duction of L/sugar-based polyurethane
work gives the development of a soft screening, and in vivo effi cacy study, and
sensor that predicts in real time the E and structural similarity search. This sustain-
substrate concentrations of an intensifi ed able path to novel anti-infective, anti-
fermentation. Details of the sensor are infl ammatory, and anti-cancer molecules is
given. (J. Chem. Technol. Biotechnol., referred. These authors have discovered
2023, 8 Oct.; DOI: 10.1002/jctb.7525). an inti-infective via chemocatalytic
th
methods with respect to dopamine struc-
Effi cient preparation of esters ture, namely tetrahydroisoquinolines, (LSPU) fi lms, as partial substitutes for
of biomass derived isohexides quinazolinones, 3-arylindoles and the petroleum-derived polyols. LSPU fi lms
were prepared using a four-component
(isosorbide) natural product tetrahydropapeveroline.
Tuneable deep eutectic solvents were system, consisting of L, hemicellu-
N.S. Bhat et al have made monoesters used. (Angew. Chem. Intl. Ed.; DOI: lose-derived sugars, polyTHF, and
hexamethylene diisocyanate isocyanu-
and diesters of glucose-derived isosor- 10.1002/anie.202308131). rate trimer. Optimisation was done and
bide (IS), which are potentially useful LSPU were evaluated as PU adhesives,
for sustainable dispersants, surfactants, Sonochemical oxidation of where the mechanical properties of the
emulsifi ers, monomer units for poly- technical lignin (L) to obtain bonded joints, comprising wood sub-
mers and plasticisers. A solvent-free, nanoparticles with enhanced strates, were measured using single-lap
high-yielding, and scalable process is functionality shear tests and properties were compa-
reported, based on the transesterifi cation rable to existing ones. (ACS Sustainable
of IS using cheap K CO as an effi cient N. Izaguirre et al have used Kraft L (KL) Chem. Eng., 2023; DOI: 10.1021/acssus-
3
2
and recyclable base catalyst. In the and ultra-sound (u/s) under mild condi- chem.eng.3C02931).
case of monoesters, the selectivity for tions for obtaining more functionalised
exo-monoester of IS was higher than the particles, avoiding the undesired reaction Biodegradable packaging based
endo-monoester. This strategy was also of degradation and depolymerisation. on poly(vinyl alcohol) and CMC
fi lms incorporated with ascor-
bic acid (AA) for food packag-
ing applications

R. Hussain et al have synthesised anti-
bacterial and biodegradable fi lms based
on natural biopolymers – CMC, PVA,
and AA cross-linked in the presence of

166 Chemical Weekly March 26, 2024

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