Question
Transcribed Text
1. Draw the major product for the following reactions involving Grignard reagents.
1
MgBr
2. H3O+
1.
Ph
"MgBr
b.
H
2. H3O+
1. CH3CH2MgBr (excess)
c.
H3CO'
2. H3O+
o
1.
d.
`MgBr
2. H3O+
1. Mg
e.
Ph
"Br
2. CH3COCH3
3. H3O+
,Br
1. Mg
2. CH3CO2CH3
f.
2
3. H3O*
Br
1. Mg
2. CH2O
g.
3. H3O+
1. Mg
2. ethylene oxide
3. H3O*
For each of the following, draw Grignard reagent and carbonyl compound (formaldehyde, an
aldehyde, a ketone, or an ester) from which the alcohol shown would be produced, following acic
workup.
OH
ex.
BrMg
OH
a.
HQ
b.
Combo
One
There are two possible combinations
for this one. Draw both possible combinations
of carbonyl compound and Grignard.
Combo
Two
OH
d.
Combo
One
There are three possible combinations
for this one. Draw all possible combinations
of carbonyl compound and Grignard.
Combo
Two
Combo
Three
OH
Ph
Makes this one using an ester
as your carbonyl compound
f.
OH
(there are two solutions, but give at least one)
2. Draw the mechanisms for the following Grignard reactions.
Ni
1. CH3MgBr
OH
2. H3O+
o
b.
OCH3
1. CH3MgBr (excess) nt OH
H3O+
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