Page 175 - Pharm.Org.Chem I 05-PC101 (1)
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10/27/2025

              Orientation and Synthesis

• The concept of orientation in disubstitution products of
 benzene can be useful in a laboratory synthesis of compounds.

• It is necessary to consider the order in which the various
 substituents are introduced into the ring.

• Example 1:

2025-2026                  Dr. Marwa El-Wakil  47

• If you do the opposite:

• The product would be a mixture of o- and p-
 chloronitrobenzene.

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