Production processes derivatives (aminomethyl) trifluoromethyl.

A process for producing a derivative of (aminomethyl) trifluoromethylcarbinol of formula (I): wherein R1 is a side chain corresponding to a a- Natural or unnatural amino acid group, R2 is a hydrogen atom or R21, in which R21 is a protecting group for amino group having a carbonyl group at the binding site with the nitrogen atom, provided that when there is a functional group in R1, then such functional groups may optionally be protected, or a salt acid addition salts thereof, which comprises reducing a derivative of 5-hydroxy-5-trifluoromethyl- 1, 3-oxazolidine of formula (II): wherein R1 and R21 are as is hereinbefore defined, removing the product, if necessary, a protecting group for R21 amino group, to provide a compound of formula (I) wherein R2 is a hydrogen atom, then followed, if necessary, converting the product into a acid addition salt thereof.