Allegra,a common prescription drug with the s | vedclass

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(B) To determine the number of stereogenic (chiral) carbon atoms,we look for carbons bonded to four different groups.$1$. The carbon atom attached to

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$2$

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(B) To determine the number of stereogenic (chiral) carbon atoms,we look for carbons bonded to four different groups.$1$. The carbon atom attached to the $-OH$ group in the side chain is chiral because it is bonded to a hydrogen atom,an $-OH$ group,a propyl-piperidine group,and a phenyl ring.$2$. The carbon atom in the piperidine ring attached to the substituent containing the two phenyl rings is chiral because it is bonded to a hydrogen atom,the piperidine ring carbons,and the carbon bearing the two phenyl groups.$3$. The carbon atom attached to the two phenyl groups and the $-OH$ group is $NOT$ chiral because it is bonded to two identical phenyl groups.Therefore,there are $2$ stereogenic carbon atoms in the structure of Allegra.

Allegra,a common prescription drug with the structure shown below,is given for the treatment of seasonal allergies. How many stereogenic carbon atoms does Allegra possess?

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