Process for the preparation of aminoaryl- and aminoheteroaryl boronic acids and esters

摘要

The present invention relates to a process for the preparation of aminoaryl- and aminoheteroaryl boronic acids and esters of formula (I) in high yields
The claimed process uses diarylketal formula (V) to generate an arylbromid of formula (III) in which the amino-group is protected as bisarylmethylidenimino-group: