The present invention concerns the use of a furfural derivative of formula (I)
in which R represents (i) a —CH═CR′
1
—COR
1
group, a group
a group
a group
or a —CHO and R′ represents a hydrogen atom or a (C
1
-C
4
)alkyl group, as a chemical vehicle, as a solvent, co-solvent, coalescing agent, crystallization inhibitor, plasticising agent, degreasing agent, etchant, cleaning agent or agent for increasing biological activity, and more particularly as a solvent.
It also concerns phytosanitary formulations or resin-solubilising formulations comprising at least one such furfural derivative of formula (I).
Elimination Reactions of Aryl Furylacetates Promoted by R<sub>2</sub>
NH in MeCN: Effects of Base Solvent and β-Aryl Group on the Ketene-forming Transition State
作者:Sang Yong Pyun、Kyu Cheol Paik、Man So Han、Byung Tae Kim、Bong Rae Cho
DOI:10.1002/bkcs.11285
日期:2017.11
Ketene‐forming eliminationfrom C4H3(O)CH2C(O)OC6H3‐2‐X‐4‐NO2 (1) promoted by R2NH in MeCN has been studied. The reactions produced elimination products and exhibited second‐order kinetics with Brönsted β = 0.51, and |βlg| = 0.47–0.53, indicating that the reaction proceeds by the E2 mechanism via an E2‐central transition state. Comparison of β, |βlg|, ΔH≠, and ΔS≠ values for R2NH‐promotedeliminationsfrom Ar
Maier, Guenther; Reisenauer, Hans Peter; Sayrac, Tugmac, Chemische Berichte, 1982, vol. 115, # 6, p. 2192 - 2201
作者:Maier, Guenther、Reisenauer, Hans Peter、Sayrac, Tugmac
DOI:——
日期:——
Generation, observation, and reactivity of furyl- and thienylketenes and bisketenes
作者:Nanyan Fu、Annette D Allen、Winnie Chan、Shinjiro Kobayashi、Thomas T Tidwell、Daryoush Tahmassebi、Angelica Aguilar、Eduardo Peña Cabrera、Jazmin Godoy
DOI:10.1139/v08-021
日期:2008.4.1
2- and 3-Furylketenes (18 and 20), 2- and 3-thienylketenes (19 and 21), and bis(2,5-ketenyl)thiophene (24) have been generated as observable reactive intermediates by photochemical Wolff rearrangements. Stabilization energies of the monoketenes 18–21 have been determined by DFT computations of isodesmic energy changes, and these ketenes are predicted to be modestly destabilized relative to phenylketene
Elimination Reactions of Aryl Furylacetates Promoted by R<sub>2</sub>NH-R<sub>2</sub>NH<sub>2</sub><sup>+</sup>in 70 mol% MeCN(aq). Effects of β-Aryl on the Ketene-Forming Transition-State
作者:Sang Yong Pyun、Ju Chang Kim、Bong Rae Cho
DOI:10.5012/bkcs.2014.35.7.2143
日期:2014.7.20
, the effect of the β-aryl group on the ketene-formingelimination was assessed.Key Words : Elimination, E2 and E1cb Mechanism, β–Aryl Group effectIntroductionExtensive studies of the structure-reactivity relationshipsin the ketene-formingeliminationreactions have led to thequalitative understanding of the relationship between thereactant structure and the mechanism.