JEE PYQ: Aldehydes And Ketones Question 48
Question 48 - 2019 (12 Jan Shift 2)
$\text{CH}_3\text{CH}_2\text{C(OH)(Ph)(CH}_3)$ cannot be prepared by:
(1). (CH$_3$CH$_2$COCH$_3$ + PhMgX)
(2). (PhCOCH$_2$CH$_3$ + CH$_3$MgX)
(3). (PhCOCH$_3$ + C$_2$H$_5$MgX)
(4). (HCHO + PhCH(CH$_3$)CH$_2$MgX)
Show Answer
Answer: (4)
Solution
Options 1-3 correctly produce the tertiary alcohol via ketone + Grignard. HCHO gives primary alcohol, not the target tertiary alcohol.
BETA
