Sodium Cyanide → Ethyl o-cyanomethylcinnamate
Reaction equation
Br[CH2:2][C:3]1[CH:15]=[CH:14][CH:13]=[CH:12][C:4]=1[CH:5]=[CH:6][C:7]([O:9][CH2:10][CH3:11])=[O:8].[C-:16]#[N:17].[Na+]>C(O)C>[C:16]([CH2:2][C:3]1[CH:15]=[CH:14][CH:13]=[CH:12][C:4]=1[CH:5]=[CH:6][C:7]([O:9][CH2:10][CH3:11])=[O:8])#[N:17]Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
Reagent XV is prepared from ethyl o-bromomethylcinnamate by the following series of reactions. (1) The starting ester is heated with a solution of sodium cyanide in ethanol to yield ethyl o-cyanomethylcinnamate. (2) This ester is hydrogenated over a Pt or Pd catalyst to afford ethyl o-cyanomethylhydrocinnamate. (3) This ester is reduced with sodium bis(2-methoxyethoxy)aluminum hydride in benzene to yield [2-(3-hydroxypropyl)phenyl]acetonitrile. (4) The nitrile is hydrolyzed by being heated with aqueous-ethanolic sodium hydroxide solution, and the acid is esterified (ethanol and mineral acid catalyst) to give ethyl [2-(3-hydroxypropyl)phenyl]acetate. (5) This hydroxy-ester is treated with phosphorus tribromide in ether to afford reagent XV.
Sources & evidence
- ORD record
- ord-1eed86c6dfcb4a078b71879f6d24a464
- Source dataset
- uspto-grants-1979_11
- Patent number
- US04175203
Reaction notes
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