1,1-Dibromo-2-(3,4-dimethoxyphenyl)ethene

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: According to the General Procedure E, 2,2-dibromo-1-(3,4-dimethoxyphenyl)ethene (4.00 g, 12.40 mmol) and n-BuLi (17.11 ml, 27.28 mmol) are converted to give after workup and chromatography (SiO2, PE/EE=1:1, Rf=0.51) the title compound (1.70 g, 10.48 mmol, 85%) as a colorless solid, m.p. 71-72° C.;

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: According to the General Procedure E, 2,2-dibromo-1-(3,4-dimethoxyphenyl)ethene (4.00 g, 12.40 mmol) and n-BuLi (17.11 ml, 27.28 mmol) are converted to give after workup and chromatography (SiO2, PE/EE=1:1, Rf=0.51) the title compound (1.70 g, 10.48 mmol, 85%) as a colorless solid, m.p. 71-72° C.;

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: According to the General Procedure E, 2,2-dibromo-1-(3,4-dimethoxyphenyl)ethene (4.00 g, 12.40 mmol) and n-BuLi (17.11 ml, 27.28 mmol) are converted to give after workup and chromatography (SiO2, PE/EE=1:1, Rf=0.51) the title compound (1.70 g, 10.48 mmol, 85%) as a colorless solid, m.p. 71-72° C.;

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: According to the General Procedure F, carbon tetrabromide (4.00 g, 12.05 mmol), triphenylphosphine (6.30 g, 24.10 mmol) and 3,4-Dimethoxybenzaldehyde (2.00 g, 12.05 mmol) are converted to give after workup and chromatography (SiO2, CH2Cl2, Rf=0.48) the title compound (3.76 g, 11.68 mmol, 97%) as a yellow oil.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: According to the General Procedure E, 2,2-Dibromo-1-(3,4-dimethoxyphenyl)ethene (4.00 g, 12.40 mmol) and n-BuLi (17.11 ml, 27.28 mmol) are converted to give after workup and chromatography (SiO2, PE/EE=1:1, Rf=0.51) the title compound (1.70 g, 10.48 mmol, 85%) as a colorless solid, m.p. 71-72° C.;

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: According to the General Procedure E, 2,2-dibromo-1-(3,4-dimethoxyphenyl)ethene (4.00 g, 12.40 mmol) and n-BuLi (17.11 ml, 27.28 mmol) are converted to give after workup and chromatography (SiO2, PE/EE=1:1, Rf=0.51) the title compound (1.70 g, 10.48 mmol, 85%) as a colorless solid, m.p. 71-72° C.;