3-CHLORO-5-METHOXYBENZALDEHYDE

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: A mixture of 3-chloro-5-methoxybenzyl alcohol (5.0 g, 28.9 mmol) and pyridinium chlorochromate (20% on alumina, 40 g, 37.8 mmol) was allowed to stir for 1.25 hr. Diethyl ether (200 ml) was then added followed by filtration of precipitate. The filtrate was concentrated under reduced pressure and the resulting residue was purified via silica gel chromatography using 40% dichloromethane, 60% petroleum ether as eluant, to give 3.8 g of 3-chloro-5-methoxybenzaldehyde. 1H-NMR (CDCl3): 3.84 (s, 3H) 7.13 (s, 1H), 7.28 (s, 1H), 7.41 (s, 1H), 9.89 (s, 1H). followed by filtration of precipitate The filtrate was concentrated under reduced pressure the resulting residue was purified via silica gel chromatography

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Triflate 5 (9 g, 28 mmol) pallidum(II) acetate (120 mg, 0.5 mmol), 1,1'-bis(diphenylphosphino)ferrocene (620 mg, 1 mmol) and hplc grad CH3CN (10 ml) were mixed well in a teflon-lined stainless steel bomb. After adding freshly made, pulverized proton sponge formate2 (7.84 g 30 mmol), the bomb was sealed and heated at 90° C. for 4 h. The cooled reaction was then filtered to remove proton sponge crystals, partitioned between EtOAc and 3 N HCl, washed once each with dilute brine and dilute NaHCO3, dried over Na2SO4, and evaporated. Silica gel chromatography (15% EtOAc/hexanes) yielded 4.25 g (88.5% of chloromethoxybenzaldehyde 6, mp 45° C. After adding freshly the bomb was sealed The cooled reaction was then filtered to remove proton sponge crystals partitioned between EtOAc and 3 N HCl washed once each with dilute brine and dilute NaHCO3 dried over Na2SO4 evaporated

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Triflate 5 (9 g, 28 mmol), palladium(II) acetate (120 mg, 0.5 mmol), 1,1'-bis(diphenylphosphino)ferrocene (620 mg, 1 mmol) and hplc grade CH3CN (10 ml) were mixed well in a teflon-lined stainless steel bomb. After adding freshly made, pulverized proton sponge formate2 (7.84 g, 30 mmol), the bomb was sealed and heated at 90° C. for 4 h. The cooled reaction was then filtered to remove proton sponge crystals, partitioned between EtOAc and 3N HCl, washed once each with dilute brine and dilute NaHCO3, dried over Na2SO4, and evaporated. Silica gel chromatography (15% EtOAc/hexanes) yielded 4.25 g (88.5%) of chloromethoxybenzaldehyde 6, mp 45° C. After adding freshly the bomb was sealed The cooled reaction was then filtered to remove proton sponge crystals partitioned between EtOAc and 3N HCl washed once each with dilute brine and dilute NaHCO3 dried over Na2SO4 evaporated

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Triflate 5 (9 g, 28 mmol), palladium(II) acetate (120 mg, 0.5 mmol), 1,1'-bis(diphenylphosphino)ferrocene (620 mg, 1 mmol) and hplc grade CH3CN (10 ml) were mixed well in a teflon-lined stainless steel bomb. After adding freshly made, pulverized proton sponge formate2 (7.84 g, 30 mmol), the bomb was sealed and heated at 90° C. for 4 h. The cooled reaction was then filtered to remove proton sponge crystals, partitioned between EtOAc and 3N HCl. washed once each with dilute brine and dilute NaHCO3, dried over Na2SO4, and evaporated. Silica gel chromatography (15% EtOAc/hexanes) yielded 4.25 g (88.5%) of chloromethoxybenzaldehyde 6, mp 45° C. After adding freshly the bomb was sealed The cooled reaction was then filtered to remove proton sponge crystals partitioned between EtOAc and 3N HCl washed once each with dilute brine and dilute NaHCO3 dried over Na2SO4 evaporated

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir: