Dimethylformamide → 2-(2-Cyanoethylidene)-bicyclo[2.2.1]heptane

HRID 2163126Notes

Reaction equation

HRID 2163126 reaction equation
[CH:1]([CH:3]1[CH2:8][CH:7]2[CH2:9][CH:4]1[CH2:5][CH2:6]2)=O.[C:10]([CH2:12]C(O)=O)#[N:11].[OH-].[NH4+].CN(C)C=O>C1C=CC=CC=1>[C:10]([CH2:12][CH:1]=[C:3]1[CH2:8][CH:7]2[CH2:9][CH:4]1[CH2:5][CH2:6]2)#[N:11]

Participants

6

Reactant 4

HCID 6228DimethylformamideHCID 9740Cyanoacetic acidHCID 14923Ammonium HydroxideHCID 86864Bicyclo[2.2.1]heptane-2-carbaldehyde

Product 1

HCID 544239752-(2-Cyanoethylidene)-bicyclo[2.2.1]heptaneYield 79%

Reagents, catalysts & solvents 1

HCID 241BenzeneSolvent

Procedure

A stirred solution of 95 g (0.77 mol) of 2-formylbicyclo[2.2.1]heptane, 65 g (0.76 mol) of cyanoacetic acid, 2 ml of ammonium hydroxide (58%), 132 ml of dimethylformamide, and 170 ml benzene was heated to reflux and the water removed with a Dean-Stark trap. The reaction was allowed to continue until the evaluation of carbon dioxide ceased (approx. 24 hrs.). Upon completion, the reaction was cooled and the solvent removed under reduced pressure. The residual oil was distilled under vacuum to give 88 g (79% yield) of 2-(2-cyanoethylidene)-bicyclo[2.2.1]heptane: b.p. 72-80° C/1 mm; ir 2960, 2870, 2260, 1685, 1450, 1420, 1305, 920; nmr 1.15-2.8 (10H, m), 2.96 (2H, m) 4.9-5.4 (1H, m); ms 147.

Workup

  1. temperatureto reflux
  2. customthe water removed with a Dean-Stark trap
  3. custom(approx. 24 hrs.)
  4. temperatureUpon completion, the reaction was cooled
  5. customthe solvent removed under reduced pressure
  6. distillationThe residual oil was distilled under vacuum

Sources & evidence

ORD record
ord-3bf553e8b90e4140a4669feace17b8f4
Source dataset
uspto-grants-1979_01
Patent number
US04132677

Reaction notes

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