An efficient synthesis of β-ketoesters via transesterification and its application in Biginelli reaction under solvent-free, catalyst-free conditions
A simple and efficient transesterification process for the synthesis of β-ketoester derivatives has been achieved by the reaction of methyl β-ketoester with higher alcohols at 110 C under solvent-free, catalyst-free conditions and its application in synthesis of 3,4-dihydropyrimidin-2(1H)-ones C-5 ester derivatives via Biginelli reaction has been described.
Dharma Rao,Acharya,Kaushik
supporting information
p. 6644 - 6647
(2013/11/19)
Liquid oligomers containing acrylate unsaturation
The liquid oligomeric compositions of this invention are made by the Michael addition reaction of acetoacetate functional donor compounds with multifunctional acrylate receptor compounds where the equivalent ratios of multifunctional acrylate to acetoacetate vary from >/=1:1 to >/=13.2:1 depending on the functionality of both multifunctional acrylate and acetoacetate. Unuseable gelled or solid oligomer products occur below the claimed ranges. The liquid oligomers of this invention are further crosslinked to make coatings, laminates and adhesives.
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(2008/06/13)
Method of preparing β-amino derivatives of α,β-unsaturated esters
A method for the preparation of β-amino derivatives of α,β-unsaturated esters of the formula CH3 C(NH2)=CHCOOR' where R' is C1 to C10 linear or branched alkyl or substituted C1 to C10 linear or branched alkyl. A reaction mixture of an acetoacetate ester of the formula CH3 C(O)CH2 C(O)OR' wherein R' is the same as defined above is first formed in an organic solvent and this mixture reacted with aqueous ammonium hydroxide in the presence of a salt of ammonia or of a metal selected from the group consisting of lithium, zinc, cadmium, cerium and lead. The salt is soluble in the organic solvent to an extent sufficient to catalyze the reaction between ammonia and the ester.
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(2008/06/13)
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