2019 A Level H2 Chemistry Paper 1 Question 23 - Deduce Structure of Amide in Compound Y
Let's take a look at 2019 A Level H2 Chemistry Paper 1 Question 23.
We need to deduce the structure of compound Y based on the following info:
Carboxylic acid W which is chiral can be converted to X which then reacts with a cycloamine to form amide Y.
Since W is chiral, Y should be chiral as well, which means Y contains a saturated carbon bonded to 4 different groups.
Also, since the structure of the cycloamine is given, the amide in Y should contain the same cycloamine structure.
Now we can go through the options to choose our best answer.
Option A is our best answer since a chiral carbon (marked with an asterisk) and the cycloamine are both present.
Option B is wrong since there is no chiral carbon.
Option C is wrong since the amine is not a cycloamine as the nitrogen is not part of the cyclostructure.
Option D is wrong since there is no chiral carbon and the amine is not a cycloamine.
Hence the answer to this question will be option A.
Topic: Nitrogen Compounds and Proteins, Organic Chemistry, A Level Chemistry, Singapore
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