12. a) Provide the structures of reagent 1 and 2 that are required to generate the following alkyne: Route 1 Reagent 1 1. NaNH,/NH3 2. CH₂Br 2 molar eq HBr 2 equivalents NaNH, NH3 H₂ Lindlar's Catalyst Pd b) Provide the structure of the product, with the correct stereochemistry where necessary, for each of the following transformations involving alkynes. If there is no reaction, write 'NR' in the respective box. excess C1₂ Route 2 NaNH, NH3 Reagent 2

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12. a) Provide the structures of reagent 1 and 2 that are required to generate the following alkyne:
Route 1
Reagent 1
1. NaNH,/NH3
2. CH₂Br
2 molar eq
HBr
2 equivalents
NaNH,
NH3
H₂
Lindlar's
Catalyst
Pd
b) Provide the structure of the product, with the correct stereochemistry where necessary, for each
of the following transformations involving alkynes. If there is no reaction, write 'NR' in the
respective box.
excess
C1₂
Route 2
NaNH,
NH3
Reagent 2
Transcribed Image Text:12. a) Provide the structures of reagent 1 and 2 that are required to generate the following alkyne: Route 1 Reagent 1 1. NaNH,/NH3 2. CH₂Br 2 molar eq HBr 2 equivalents NaNH, NH3 H₂ Lindlar's Catalyst Pd b) Provide the structure of the product, with the correct stereochemistry where necessary, for each of the following transformations involving alkynes. If there is no reaction, write 'NR' in the respective box. excess C1₂ Route 2 NaNH, NH3 Reagent 2
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