3-bromobut-3-en-2-one synthesis
- Product Name:3-bromobut-3-en-2-one
- CAS Number:61203-01-8
- Molecular formula:C4H5BrO
- Molecular Weight:148.99
25109-57-3
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Yield:61203-01-8 85%
Reaction Conditions:
with sodium chloride;triethylamine in chloroform;
Steps:
R.2 REFERENTIAL EXAMPLE 2
REFERENTIAL EXAMPLE 2 This example illustrates the synthesis of 2-bromo-1-buten-3-one. A solution of 1.15 g (5 millimoles) of 3,4-dibromo-2-butanone in 20 ml of chloroform was cooled to -20° C., and 0.5 g (5 millimoles) of triethylamine was added dropwise to the solution with stirring and the temperature was gradually elevated to room temperature. The reaction mixture was washed with a saturated aqueous solution of sodium chloride to which ice was added. The oil layer was dried by sodium sulfate, and the solvent was removed by distillation under reduced pressure to obtain 0.63 g of the intended compound in the form of a colorless oil (the yield was 85%). 1 H-NMR spectrum (CDCl3; ppm): STR18 (a) 2.50 (3H, s) (b) 6.53 (1H, d, J=3 Hz)
References:
US4814500,1989,A
78-94-4
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$32.86/25ml
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