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US 8,461,331 B2Granted
Method for the production of 3,6-dihydro-L, 3, 5-triazine derivatives from metformin and paraldehyde derivatives
AssigneePoxel
InventorsMatthias Helmreich, Mike Brandner
Life of this patent
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Abstract
Process for the preparation of compounds of the formula I in which R1, R2, R3, R4, R5 and R6 have the meanings indicated in claim 1, which comprises the reaction of a compound of the formula II in which R1, R2, R3, R4 have the meanings indicated above, with a compound of the formula III in which R5, R6 have the meanings indicated above.
Claims8
Process for the preparation of a compound of the formula I
- in which
- R1, R2 each, independently of one another, denote H or A,
- R3, R4 each, independently of one another, denote H, A, alkenyl having 2-6 C atoms or alkynyl having 2-6 C atoms
- R5, R6 each, independently of one another, denote H or A,
- A denotes unbranched or branched alkyl having 1-10 C atoms, in which 1-7 H atoms may be replaced by F, or cyclic alkyl having 3-7 C atoms,
- or an acid-addition salt thereof,
- which comprises the reaction of a compound of the formula II
- in which
- R1, R2, R3, R4 have the meanings indicated above, with a compound of the formula III
- in which
- R5, R6 have the meanings indicated above,
- wherein the reaction is carried out in the presence of an organic or inorganic acid or an acidic cationic ion exchanger resin.
9 more elements
Dependencies are inferred from the claim text.