Patent ID: 7586015

Claim:
A process for the preparation of the compounds of formula (I): in which: R1 is an alkyl or an aryl; R2, R3, R4 and R5 independently are a hydrogen atom, an alkyl or an aryl, it being possible for the alkyl or aryl groups to have one or more hydrogen atoms replaced by one or more substituents; R4 and R5 together form a heterocycle with the nitrogen atom, which itself comprises one or more substituents; and R4 and R3 together form a carbocycle, which itself comprises one or more substituents, wherein the process comprises reacting, in two steps: a) a boric precursor compound selected from the group consisting of: i) a boroxine of formula (II): ; and of ii) a boronic acid of formula (VI): with a compound of formula (III) to give a boronate compound of formula (IV): b) the boronate compound of formula (IV) with an amino alcohol compound of formula (V): wherein: G is an alkoxy group (OR′2) or an amino group (NR′R′1); R′, R′1, and R′2 are identical or different and are an alkyl group or an acyl; R′ and R′1 can together form a 5 or 6 membered heterocycle optionally substituted by an alkyl; R″ is a hydrogen atom, an alkyl group or an aryl group; and R1, R2, R3, R4 and R5 are as defined above, to give the above-mentioned compound of formula (I).