119718-90-0Relevant articles and documents
Efficient acid-catalyzed conversion of phenylglyoxal to mandelates on flame-derived silica/Alumina
Wang, Zichun,Jiang, Yijiao,Baiker, Alfons,Huang, Jun
, p. 1573 - 1577 (2013)
Amorphous, nonporous silica/alumina (SA) made by flame-spray pyrolysis (FSP) efficiently catalyzes the direct conversion of phenylglyoxal (PG) to alkyl mandelates. The SAs exhibited a turnover frequency more than an order of magnitude higher than dealuminated zeolite Y, which hitherto has been considered as the most active solid acid for this reaction. The free diffusion of PG to surface acid sites and rapid removal of mandelate products are proposed to be at the origin of the superior performance of SAs. The recyclability of the catalyst was tested in five repetitive runs and showed no significant loss of catalyst performance.
An efficient and convenient procedure for preparation of mandelates catalysed by TiO2/SO4/2- solid superacid
Jin,Ma,Li,Sun,Li
, p. 2051 - 2054 (2001)
An easy and efficient synthesis of mandelates in excellent yields from mandelic acid with alcohols catalysed by TiO2/SO42- solid superacid.
Novel SO3H-functionalized polyoxometalate-based ionic liquids as highly efficient catalysts for esterification reaction
Keshavarz, Mosadegh,Iravani, Nasir,Parhami, Abolfath
, p. 272 - 278 (2019/04/25)
Three novel heteropolyanion-based Br?nsted acidic ionic liquids (BAILs), butane mono sulfoacid-functionalized 1,10-phenanthrolinum, butane mono and bis sulfoacid-functionalized 1,4-dimethylpiperazinium salts of phosphortungstate catalyst (PhBs1-PW, [PipBs1]3-PW and [PipBs2]3-(PW)2) were synthesized and well characterized with FTIR, 1H and 13C NMR, Electro-Spray Ionization Mass Spectrometry (ESI-MS), Elemental analysis (CHNS), EDX and TG analysis techniques. The esterification reactions of monocarboxylic acids with monohydric alcohols were carried out using these catalysts. The introduced catalysts present a self-separation performance after reaction, which can be easily recovered and quite steadily reused as confirmed by six-run recycling test. Moreover, bis sulfoacid-functionalized 1,4-dimethylpiperazinium salt of phosphortungstate showed the best catalytic performance among the prepared catalysts for the esterification reaction.
Mandelic acid derived ionic liquids: synthesis, toxicity and biodegradability
Prydderch, Hannah,Haiβ, Annette,Spulak, Marcel,Quilty, Brid,Kümmerer, Klaus,Heise, Andreas,Gathergood, Nicholas
, p. 2115 - 2126 (2017/01/22)
A series of ten ionic liquids (ILs) was synthesised from the renewable resource mandelic acid. The ILs showed low antimicrobial activity towards the thirteen bacterial and twelve fungal strains they were screened against. A general trend of increasing bacterial toxicity in the order methyl ester 60% in 28 days), a series of biodegradation transformation products has been proposed based on the degradation of the ester/amide alkyl chain. This data has allowed for an assessment of the effect of IL structural features on toxicity and biodegradation, particularly allowing for a comparison to earlier work where additional oxygen atoms were present to facilitate biodegradation and attenuate toxicity. The mandelic acid derived ILs did not pass the Closed Bottle test (OECD 301D) and can be included in the rules of thumb for the design of biodegradable ILs.