| abstract |
process for the preparation of amines. The present invention relates to an innovative process for the preparation of the compound of formula (i): wherein R1 and R2 are independently H or C1-6 alkyl comprising treating with an agent. A reductant is a compound of the formula generally (ii): wherein R 4 R 2 and R 2 have the meanings provided for the compound of the formula (I), R 3 is H or C 1-4 alkyl and ph is phenyl, or a compound of the formula generally (iii): wherein r 1, 4, r 2, r 3 and ph have the meanings given for the compound of formula (ii), being the effective reducing agent for cleaving the benzyl moiety ph-ch (r ^ 3 ^) - from the benzyl amino phch (r ^ 3 ^) nh- moiety in the compound of formula (ii), or in the case of the compound of formula (iii), leave a group amino and, furthermore, in the case of the compound of formula (iii), reduce the double bond 2,3 and also the double bond joining the moiety to the 9 position of the benzonorbornene ring for bonds. simple. The present invention also relates to processes for the preparation of compounds (ii) and (iii) and their precursors and to compounds (ii) and (iii) themselves and certain of their precursors, which are unusual compounds. The compounds (1) are useful for the preparation of various benzonorbornen-5-yl-amides of fungicidal heterocyclyl carboxylic acids. |