NEW MATERIAL:The nitrogen-containing heterocyclic compound of formula I or formula II (R1 is B, 1-18C alkyl, aryl, aralkyl or heterocyclic group; R2 is H or 1-6C alkyl; (n) is 0-3; when (n) is 1 and R1 is H or methyl, R2 is 1-6C alkyl) or its salt.
EXAMPLE: 2-Ethyl-1,4,5,6-tetrahydro-4-pyrimidinecarboxylic acid.
USE: Useful as a synthetic intermediate for pharmaceuticals, agricultural chemicals or organic electronic material such as liquid crystal.
PREPARATION: The compound of formula I or formula II can be produced by reacting a compound of formula III (X is C≡N, group of formula IV or formula V; R9 and R11 are 1-6C alkyl; R10 and R12 are H or 1-8C alkyl) with a compound of formula VI (R16 is H or 1-6C alkyl) (e.g. 2,3-diaminopropionic acid) in a solvent such as water or methanol.
Next Patent: PYRIDAZINONE COMPOUND