الفهرس 
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Abstract
This thesis includes three main chapters and ends with
a list of references.
The first chapter covers the most up to date literature
for the reaction of erythro-2,3-dibromoketones with dif-
ferent nucleophiles and
the postulated mechanisms for
these reactions.
The second chapter is divided into two parts:
The first part describes the method of preparation of trans-
1,3-diaryl-2-propenones la-i and their bromination in
rv
chloroform which gave the corresponding erythro-2,3-dibromo-
1 , 3 - d i a r y 1 - 1 - pro pan 0 n e ”E,a _ i .