Problems 333
c. d.
- How could one use UV spectroscopy to distinguish between the compounds in each of the following pairs?
a.
b.
c.
d.
- What two sets of a conjugated diene and a dienophile could be used to prepare the following compound?
- a. Which dienophile is more reactive in a Diels–Alder reaction?
b. Which diene is more reactive in a Diels–Alder reaction?
- Cyclopentadiene can react with itself in a Diels–Alder reaction. Draw the endo and exo products.
- Which diene and which dienophile could be used to prepare each of the following compounds?
a. c.
b. d.
O
O
O
Cl
Cl
CN
CN
C
O CH 3
CH 2 CHCH CHOCH 3 or CH 2 CHCH CHCH 2 OCH 3
O
- CH 2 CHCH or 2.
O
CH 2 CHCH 2 CH
O
CH 2 CHCH or CH 2 CHCH 3
O
CCH 3
and
OH OCH 3
O
and
O
CH 2 CHCH CHCH CH 2 and CH 2 CHCH CHCCH 3
O
and
CH 2 CH C CH 2 + CH 2 CHCH 2 Cl
∆
CH 2 CH C CH 2 + CH 2 CHCCH 3 ∆
O
