Synthesis some of Pyrazines and oxazoles

Abstract

Decaboxylative Transamination of the α-amino acids glycine , alanine
and tyrosine in the presence of the symmetrical and asymmetrical benzoins [ 4,4´
- di methyl benzoin , 4,4´ - di chloro benzoin and 4- amino benzoin led to the
formation of oxazoles ,tetra –substituted pyrazine and the corresponding benzils