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US 7,071,351 B2Granted
Synthesis of alkylaminoalkyl (meth)acrylate by transesterification
AssigneeRoehm GmbH
InventorsBardo Schmitt, Joachim Knebel, Maik Caspari
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Abstract
The invention relates to a method for transesterifying methyl methacrylate involving catalysis, particularly zirconium acetylacetonate catalysis. The obtained esters of formula (I) are characterized by having an extremely low content of cross-linking agents.
Claims3
A transesterification process, comprising:
- preparing a compound of formula I:
- wherein R1 is hydrogen or methyl, R3 is hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl or t-butyl, R4 is methyl, ethyl, propyl, isopropyl, butyl, isobutyl or t-butyl, and R5 is methylene, ethylene, 1,3-propylene, 1,4-butylene, 2-methyl-ethylene or 2,2-dimethyl-propylene by reacting a compound of formula II
- wherein R1 is as defined above and R2 is hydrogen, methyl or ethyl with a compound of formula III
- wherein R3, R4 and R5 are as defined above, in the presence of a catalyst of zirconium acetylacetonate in an amount ranging from 0.1–5% by weight, based on the total weight of the reactants.
1 more element
Dependencies are inferred from the claim text.