10431-84-2Relevant academic research and scientific papers
Facile one-pot synthesis of 2-oxazoline
Zhu, Jipeng,Zhou, Min,Jiang, Weinan,Zhou, Yang,Song, Gonghua,Liu, Runhui
supporting information, (2022/01/28)
We developed a facile one-pot synthesis of 2-oxazolines from carboxylic acid and 2-chloroethyl isocyanate, involving amide bond formation and a following intramolecular cyclization using 4-dimethylaminopyridine as the catalyst. A large variety of functional groups are well tolerated by the mild reaction conditions to afford diverse 2-oxazolines in good to excellent yields. This reaction will keep the chirality of the isocyanate at position 1, the R2 substituted carbon. Microwave-assisted synthesis can further enhance the reaction yield and reduce the reaction time to 5 min. This method facilities the synthesis of 2-oxazolines for diverse applications, such as 2-oxazoline derived polymers and materials.
A convenient synthesis of 2-oxazolines and 2-benoxazoles with PPh3-DDQ as the dehydrating reagent
Xu, Quancai,Li, Zhengning,Chen, Huiying
experimental part, p. 925 - 932 (2012/01/03)
2-Oxazolines and 2-benoxazoles were synthesized in high yields from acylamino alcohols and acylaminophenols, respectively, with triphenylphosphine- 2,3-dichloro-5,6-dicyanobenzoquinone (PPh3-DDQ) as the dehydrating and activating reagent. The synthesis was accomplished under neutral conditions.
A facile synthesis of 2-oxazolines using a PPh3-DDQ system
Xu, Quancai,Li, Zhengning
experimental part, p. 6838 - 6840 (2010/04/29)
A facile and efficient synthesis of 2-oxazolines from N-(2-hydroxyethyl)amides using a triphenylphosphine-2,3-dichloro-5,6-dicyanobenzoquinone (PPh3-DQQ) system is described. The reaction proceeds under neutral and mild conditions, and excellent yields are obtained.
Process for the production of 2-alkyl- or alkenyl-2-oxazolines
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, (2008/06/13)
A process for the production of 2-alkyl- or alkenyl-2-oxazolines, in which the alkyl or alkenyl group may be a hydroxy-, dihydroxy- or hydroxy, C1 -C2 -alkoxy-substituted hydrocarbon radical containing at least 7 carbon atoms, produces the subject compounds in high yields when C8 -C22 fatty acids or esters thereof are reacted with 2-amino-ethanol or ethanolamides of these fatty acids in the presence of titanium or zirconium compounds corresponding to the formula M(OR2)4 wherein M=Ti or Zr.
Compositions and method comprising heterocyclic compounds containing two heteroatoms as membrane penetration enhancers
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, (2008/06/13)
A method and compositions for enhancing absorption of topically administered physiologically active agents through the skin and mucous membranes of humans and animals in a transdermal device or formulation for local or systemic use, comprising a therapeutically effective amount of a pharmaceutically active agent and a non-toxic, effective amount of penetration enhancing agent of the formula I: STR1 wherein R is a saturated or unsaturated, straight or branched, cyclic or acyclic hydrocarbon group with from 1 to 19 carbon atoms, alkoxyalkyl, haloalkyl, specifically trifluoromethyl, alkoxy, amino, alkylamino and acylamino; R' and R" are hydrogen, alkyl, trifluoromethyl, alkoxyalkyl, aminoalkyl, alkyl- and acylaminoalkyl, carboxy, carbalkoxy, hydroxyalkyl or lower alkyl ester thereof; X is O or NR1 wherein R1 is hydrogen, alkyl, alkenyl, alkoxyalkyl, carbalkoxyalkyl, aminoalkyl, alkyl- and acylaminoalkyl, hydroxyalkyl or hydroxyalkyloxyalkyl and lower alkyl ester thereof; and n is 2 or 3 are disclosed.
Compositions and method comprising heterocyclic compounds containing two heteroatoms
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, (2008/06/13)
A method and compositions for topically administering physiologically active agents through the skin and mucous membranes of humans and animals in a transdermal device or formulation for systemic use or to the skin of humans and animals for localized use comprising applying to such skin or membrane a mixture of said physiologically active agent and a non-toxic, effective penetrating amount of penetration enhancing compound having the structural formula I: STR1 wherein: R is a saturated or unsaturated hydrocarbon group with from 5 to 19 carbon atoms; R' and R" are hydrogen, lower alkyl, trifluoromethyl, lower hydroxyalkyl or lower alkyl ester of lower hydroxyalkyl, with the proviso that both R' and R" are not lower hydroxyalkyl; X is O or NR1 ; R1 being hydrogen, lower alkyl, lower alkenyl, lower hydroxyalkyl or lower alkyl ester of lower hydroxyalkyl are disclosed.
