In the following reaction sequence, products I, J and L are formed. K represents a reagent.
The structures of compounds and , respectively, are
The structures of compounds and , respectively, are
- (A)(see structure) and
- (B)(see structure) and
- (C)(see structure) and
- (D)(see structure) and
Answer: (A)
Solution
Compound I (6-bromohex-3-yne) undergoes Grignard reaction:
This produces hex-3-ynoic acid, which is compound J.
To convert the carboxylic acid to an acid chloride (for the next step), thionyl chloride () is used as reagent K.
Therefore, option (A) is correct.
- Formation of Grignard reagent with Mg/ether
- Reaction with
- Hydrolysis with
This produces hex-3-ynoic acid, which is compound J.
To convert the carboxylic acid to an acid chloride (for the next step), thionyl chloride () is used as reagent K.
Therefore, option (A) is correct.
JEE Advanced · 2008 · 13 Apr 2008 · Paper 1 · Single correct option