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The S enantiomer of ibuprofen is respons...

The S enantiomer of ibuprofen is responsible for its pain-relieving properties, which one of the structures is (S)-ibuprofen?

A

B

C

D

Text Solution

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The correct Answer is:
To determine which structure represents (S)-ibuprofen, we will follow a systematic approach using the Cahn-Ingold-Prelog priority rules and the flying wedge projection method. Here’s a step-by-step solution: ### Step 1: Identify the Chiral Center First, we need to identify the chiral carbon in ibuprofen. A chiral center is a carbon atom that is attached to four different groups. In ibuprofen, the chiral carbon is typically the one that is bonded to the carboxylic acid group, a methyl group, a phenyl group, and a hydrogen atom.
To determine which structure represents (S)-ibuprofen, we will follow a systematic approach using the Cahn-Ingold-Prelog priority rules and the flying wedge projection method. Here’s a step-by-step solution: ### Step 1: Identify the Chiral Center First, we need to identify the chiral carbon in ibuprofen. A chiral center is a carbon atom that is attached to four different groups. In ibuprofen, the chiral carbon is typically the one that is bonded to the carboxylic acid group, a methyl group, a phenyl group, and a hydrogen atom.
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The analgesic drug ibuprofen (A) is chiral and exists in (+) and (-) froms. One enantiomer is physiologically active, while the other is inactive. The other is inactive. The structure of ibuprofen is given below. The IUPAC name of (A) is:

The analgesic drug ibuprofen (A) is chiral and exists in (+) and (-) froms. One enantiomer is physiologically active, while the other is inactive. The other is inactive. The structure of ibuprofen is given below. The number of sigma -bonds in (A) is: