Question

Which is the most suitable reagent for the following conversion?
$CH_2 = CHCH_2 - OH \to CH_2 = CH - CHO$

• A. $K_{2} Cr_{2} O_{7}$ in acidic medium
• B. DIBAL-H
• C. $PCC$
• D. $O_3/H_2O - Zn$ dust

Answer 1

Answer: (C)

$\underset{\text{Allyl alcohol}}{CH_2=CHCH_2OH} \xrightarrow[CH_2Cl_2]{C_5H_5\overset{+}{N}HCrO_3Cl^-(PCC)} \underset{\text{Prop-2-enal}}{CH_2=CH - CHO}$