1) In the following reactions, give the nature and possibly the stereochemistry of A1, A2 and B and justify the proportions obtained. CI OH majority isomere of A1 KOtBu ΑΙ + B DMSO H2SO4 equimolar mixture ΑΙ + A2

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1) In the following reactions, give the nature and possibly the stereochemistry of
A1, A2 and B and justify the proportions obtained.
4
1=3
|=1
CI
ull
OH
KOtBu
3
DMSO
H₂SO4
majority
A1
A1
+
2)When the first compound is treated with MeONa in methanol, compounds A1 and B are also
obtained, as well as a higher molecular weight compound C, which has a higher molecular weight. B
are also obtained as well as a higher molecular weight compound C whose 1H NMR spectrum is
given below. Justify the formation of C.
2
PPM
equimolar mixture
+
isomere of A1
1=3
mobilie
B
A2
1=3
1=3
1
1=3
O
Transcribed Image Text:1) In the following reactions, give the nature and possibly the stereochemistry of A1, A2 and B and justify the proportions obtained. 4 1=3 |=1 CI ull OH KOtBu 3 DMSO H₂SO4 majority A1 A1 + 2)When the first compound is treated with MeONa in methanol, compounds A1 and B are also obtained, as well as a higher molecular weight compound C, which has a higher molecular weight. B are also obtained as well as a higher molecular weight compound C whose 1H NMR spectrum is given below. Justify the formation of C. 2 PPM equimolar mixture + isomere of A1 1=3 mobilie B A2 1=3 1=3 1 1=3 O
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