Phosphine, triphenyl-, hydrobromide → (5-Methyl-2-thenyl)triphenylphosphonium bromide
Reaction equation
O[CH2:2][C:3]1[S:4][C:5]([CH3:8])=[CH:6][CH:7]=1.[Br-:9].[C:10]1([PH+:16]([C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1>C(#N)C>[Br-:9].[CH3:8][C:5]1[S:4][C:3]([CH2:2][P+:16]([C:17]2[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=2)([C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[C:10]2[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=2)=[CH:7][CH:6]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 75 °C
Procedure
2-Hydroxymethyl-5-methyl-thiophene (4.6 g.) was dissolved in 100 ml. of acetonitrile and 12.2 g. of triphenylphosphonium bromide were added. The reaction mixture was heated to 75° C. for 2.5 hours. After cooling the resulting precipitate was filtered off, washed with benzene and dried at 80° C. under high vacuum. The resulting (5-methyl-2-thenyl)triphenylphosphonium bromide has a m.p. 262°-266° C.