New chiral compounds derived from hexanoic acid esters, process and intermediates for preparation, use in the synthesis of 2- (bromomethyl) 2-ethyl hexanoic chiral.

摘要

5 / Application of the compounds of formula (I) as defined in claim 1 for the preparation of chiral compound of formula (A): (A) wherein a compound of formula (I) is subjected to the action of a reducing agent to obtain a chiral compound of formula (V): (V) wherein R2 has the meaning indicated in claim 1, which is saponified to obtain the chiral acid of formula (VI) (VI) which is subjected to the action of a brominating agent to obtain the chiral compound of formula (a). 6 / application according to claim 5, wherein a compound of formula (I) in which R1 represents R''1 is used, as defined in claim 1. 7 / The compound of formula (III '') wherein B''y R2 are as defined in claim 4. 8 / chiral compounds of formulas: (IV) and (IV1) and (IV ') and (IV''1) in which a , B, C, B '' and R2 are as defined in claim 4. 9 / chiral compounds of formulas: (V) and (VI) in which R2 is as defined in claim 5. 10 / chiral compound of formula (A): (A) 13