- Synthesis of aldehydes from carboxylic acids via 2-imidazolines
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The use of readily available 2-substituted-2-imidazolines as precursors to 2-hydroxy aldehyde, unsaturated aldehyde and a variety of functionalized aldehydes is reported. It provides a novel method for the preparation of aldehydes from carboxylic acids via 2-substituted-2-imidazolines.
- Shi, Zhen,Gu, Huan
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p. 2701 - 2707
(2007/10/03)
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- Compositions and method comprising heterocyclic compounds containing two heteroatoms
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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.
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- Rapid Synthesis and Interconversions of Fatty 4,5-Dihydroimidazoles and Fatty 1,4,5,6-Tetrahydropyrimidines. Thermal Cyclizations of Fatty Amides Involving Phenyl Phosphorodiamidate
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Brief heating of ethane-1,2- and propane-1,3-bis-fatty amides at 235-250 deg C with phenyl phosphorodiamidate gave routes to high yields of 2-fatty alkyl-4,5-dihydroimidazoles and 1,4,5,6-tetrahydropyrimidines.Ready interconversions of fatty dihydroimidazoles and tetrahydropyrimidines, involving diamine exchange with solvent, were observed on brief heating of these materials in ethylenediamine and trimethylenediamine as solvents.
- Butler, Richard N.,Thornton, John D.,O'Regan, C.B.
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p. 2197 - 2200
(2007/10/02)
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