Page 185 - CW E-Magazine (13-8-2024)

Special Report Special Report

the above transformations. Further di- in one to three dimensional deformable Sustainable aviation fuel from Effi cient Ni-catalysed telomeri-
rection are given. (Green Chem., 2024: products. (ACS Sustainable Chem. Eng., prehydrolysis liquors sation on glycerol carbonate: a
DOI: 10.1039/D4GC01983K). 2023, 11, 15789). new linear route for lignin (L)
D. Lebedeva et al have referred to the functionalisation
Green and intrinsically safe Highly effi cient hydrolysis of current textiles production from forestry
pathways for the catalytic syn- cellulose to sugars using super- wherein hemicellulose is removed by T. Richard et al have developed the title
thesis of diisocyanates containing critical co (Scc) as a green pre-hydrolysis before delignifi cation. functionalisation of L. The biobased
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This pre-hydrolysis liquor is incinerated
the furan ring from 5-hydroxy- acid catalyst and solvent in the recovery boiler at low effi ciency. grafting reagent reacts with L without
generating co-products and this is a
methylfurfural (HMF) H.U. Kim et al have worked on the It is desirable to valorise this liquor and high-atom economical reaction leading
ball-milling pretreated cellulose and these authors have suggested upgrading to three sets of glycerol carbonate ethers
Y. Bai et al have worked on making Sustainable dye extraction An- X. Sun et al have reported a hydro- hydrolysed it using oxidised carbon in 5 steps, to yield aviation fuels. Firstly, with various chain lengths that can be
the title diisocyanates without using genolysis of F to produce PDs and various catalysts at 150°C and 100-300 bar-CO dehydration is done to get furfural by separated from the catalyst to avoid L
2
hazardous phosgene. The starting natto (A) powder production in heterogeneous catalysts have been stu- to give glucose. SCC acts as an acid using zeolite catalysis, which is them contamination with metals. Kraft, organo-
material is HMF and the authors have a fountain confi ned spouted bed died and future trends of highly selective catalyst as well as a solvent which gives reduced to furfuryl alcohol (FA) using solv and soda Ls, without prior purifi -
synthesised a new compound, methyl conversion to different PDs are given. pH of about 3.1. SCC and water form Au@NC catalyst. Rhenium catalysed cation were used. Full characterisation of
furan-2,5-dimethylene dicarbamate N.P. Almeida et al have referred to This review covers catalyst systems a pickering emulsion, which enhances Achmatowicz rearrangement gives a the products through NMR, IR, SEC and
(FDC) using 2,5-bis(aminomethyl) widespread applications of A in food, which selectively give 1,5-pentanediol the cellulose-carbon contact. The hydro- C-5 intermediate, which undergoes DSC were done. (Green Chem., 2024:
furan (BAF) and dimethyl carbonate pharma, and cosmetics and the conven- or 1,2-pentanediol or even 1,4-pen- lysis of cellulose is very fast. (Chem. self-condensation to give C-10 oxygen- DOI: 10.1039/D3GC03511E).
(DMC), the selective hydrogenation tional methods face environmental and tanediol. (Catalysis Commun., 2024, Eng. Jl., 2024, 493, 1 August, 152336; ated precursor. Ru/C is used to carry out
of FDC to a new compound methyl economic challenges. A solvent-free and 187, Feb., 106864; DOI:10.1016/j. DOI:10.1016/j.cej2024.152336). hydrodeoxylation to give hydrocarbons clean synthetic strategies to bio-
tetrahydrofuran-2,5-dimethylene di- eco-friendly approach using mechanical catcom.2024.106864). as aviation fuel. (Green Chem., 2024: logically active molecules
carbamate (THFDC), and FDC and attrition within a fountain containing role of deep Eutectic Solvent DOI: 10.1039/D4GC01257G). from lignin (L): A green path to
THFDC catalytic decomposition to confi ned spouted bed, offering a cost (dES) precursors as hydro- drug discovery
effective solution for A cultivation is Aqueous biphasic hydroformy-
produce corresponding furan-2,5-di- proposed. The impact of four parameters – lation (oxoreaction) of oleo- tropes: unveiling synergism/ Selective degradation of techni-
methylene diisocyanate (FDI) and cally relevant lignin (L) to vanil- A.M. Afanasenko et al have reported
tetrahydrofuran-2,5-dimethylene di- fountain confi ner position and length, chemicals antagonism for enhanced kraft lic acid (VA) and protocatechuic sustainable strategies for the synthesis
isocyanate (THFDI). CH ONa acts as a draft tube diameter, and airfl ow velo- lignin (L) dissolution acid (PcA) of diverse biologically active com-
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good catalyst for the synthesis of FDC city – have been investigated. CFD-DEM T.F.H. Roth et al have used a jet-loop [Valorising of L continues to attract pounds, including tetrahydroisoquin-
from BAF and DMC, and the separa- simulation were done. (Can. J. Chem. reactor for the title reaction for e.g. F.H.B. Sosa et al have referred to the of a lot of attraction in view of its im- olines, quinazolinones, dopamine, and
tion yield of FDC was 98%. 0.5% Pd/ Eco., 2024: DOI: 10.1002/cjce.25292). methyl oleate in isopropanol/water sys- remarkable capability of hydrotropes portance and lignochemistry has been the natural product tetrahydropara-
Al O is a good hydrogenation catalyst Furfural (F) to pentanediols tem; methyl 10 undecenoate was used (HS) to enhance the aqueous solubility ushered and this column has covered veroline. Firstly, L-derived platform
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2
for FDC to THFDC, with a yield of in butanol/water system. Rh loss was of L, which is an amphiphilic macro- many papers.] chemical was made. Thus novel an-
99.9% and catalyst can be recycled. (Pds) very small at 16.7 mg Rh/kg product. molecule. DESs have also exhibited ti-infective, anti-inflammatory, and
Thermal decomposition of FDC to [This column has covered many papers An optimal compromise between activity hydrotropic behaviour, making them F. Moeller et al have come out with a anticancer molecules are referred. The
THFDC were optimised to give FDI and on converting F, available through and catalyst retention is required. (Cata- attractive options for L dissolution. The new and practical method for the thermal core structure of dopamine, namely,
THFDI in 89% and 93% respectively. renewable raw materials, into various lysis Today, 2024, 439, Sep., 114803; capacity of six alcohols and cholinium degradation of technically relevant bio- tetrahydroisoquinolines, quinazolinone,
(Green Chem. 2024: DOI: 10.1039/ products, which also brings out the DOI:10.1016/j.cattod.2024.114803). chloride to enhance the solubility of L based L. Here a solution of L in highly 3-arylindoles and the natural product
D4GC00546E). versatility of catalysis.] in water was studied; 1,4-Butanediol concentrated caustic potash is heated, tetrahydroparaverolin are referred.
Packaging materials from works well. (ACS Sustainable Chem. and VA is almost exclusively obtained (Angew. Chem. Intl. Ed., 2024: DOI:
mushrooms Eng., 2024: DOI: 10.1021/acssusche- in yield of up to 10.6 wt%. Through a 10.1002/anie.202308B1).
meng.4C02529). change in reaction parameters it is pos-
H. Nakauchi et al have found a simple sible to selectively carry out demethyl- Acetaldehyde (A) to acetoin
way of getting mycelial fi bres, called ation, leading to PCA in 6.9 wt% yield. (Ac)
‘mycelial pulp’, from fruiting mush- Different types of Kraft and Organosolv
rooms bodies and bleaching them via L can be used. Further, ion exchange M. Bellefl amme et al have reported a cata-
treatment with NaOH and H O ; sunlight resins were used in the work up of the lytic synthesis of AC (3-hydroxy-2-bu-
2
2
irradiation and ultrasonic treatment is highly caustic potash solution and this tanone) from A using an N-heterocyclic
used to defi brillate the fruiting bodies alkaline solution was directly used for carbene (NHC) catalyst, which was
at the mycelial level. This pulp has at least 5 times. (ChemSusChem, 2024: immobilised on a Merrifi eld’s peptide
excellent deformability and can be used DOI: 10.1002/cssc.202400759). resin and characterised through solid

184 Chemical Weekly August 13, 2024 Chemical Weekly August 13, 2024 185

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