2,4,6-Triiodophenol

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: Dodecanoyl chloride (2.95 ml, 12.8 mmol) was added to a suspension of 2,4,6-triiodophenol (6.0 g, 12.7 mmol) in refluxing acetonitrile (50 ml) and the mixture was heated under argon for 24 hrs. The reaction mixture was cooled and washed with saturated aqueous sodium bicarbonate. The organic layer was dried over magnesium sulfate, filtered, and evaporated to dryness under vacuum to give an off-white solid. The crude product was recrystallized from methanol to give 6.9 g (83%) of the desired ester, mp 68°-69° C. the mixture was heated under argon for 24 hrs The reaction mixture was cooled washed with saturated aqueous sodium bicarbonate The organic layer was dried over magnesium sulfate filtered evaporated to dryness under vacuum to give an off-white solid The crude product was recrystallized from methanol

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

Procedure: A mixture of 2,4,6-triiodophenol (2.0 g, 4.24 mmol), 2-propylvaleroyl chloride (2.5 ml, 12.7 mmol, 3 eq) and 4-dimethylaminopyridine (DMAP; 20 mg) in 20 ml of acetonitrile was refluxed under argon overnite. The reaction mixture was cooled and poured into excess aqueous sodium bicarbonate and then extracted with dichloromethane. The dichloromethane extract was dried over magnesium sulfate, filtered, and evaporated to give the crude product (2.42 mmol, 95%) as a pink solid. Recrystallization from ethyl acetate gave 1.75 g (68%) of pure product, mp 99°-101° C. was refluxed under argon overnite The reaction mixture was cooled extracted with dichloromethane The dichloromethane extract was dried over magnesium sulfate filtered evaporated to give the crude product (2.42 mmol, 95%) as a pink solid Recrystallization from ethyl acetate

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

Procedure: A mixture of 2,4,6-triiodophenol (2.0 g, 4.24 mmol), 2-propylvaleroyl chloride (2.5 ml, 12.7 mmol, 3 eq) and 4-dimethylaminopyridine (DMAP; 20 mg) in 20 ml of acetonitrile was refluxed under argon overnite. The reaction mixture was cooled and poured into excess aqueous sodium bicarbonate and then extracted with dichloromethane. The dichloromethane extract was dried over magnesium sulfate, filtered, and evaporated to give the crude product (2.42 mmol, 95%) as a pink solid. Recrystallization from ethyl acetate gave 1.75 g (68%) of pure product, mp 99°-101° C. was refluxed under argon overnite The reaction mixture was cooled extracted with dichloromethane The dichloromethane extract was dried over magnesium sulfate filtered evaporated to give the crude product (2.42 mmol, 95%) as a pink solid Recrystallization from ethyl acetate

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

Procedure: A solution of 2,4,6-triiodophenol (20.0 g, 42 mmol), 2-ethylhexanoyl chloride (25 ml, 144 mmol, 3.5 eq.) and 4-dimethylaminopyridine (DMAP; 2 mmol, 250 mg, 0.05 eq.) in 150 ml of pyridine was stirred overnite at room temperature. The solution was poured into 1000 ml of 1N aqueous hydrochloric acid and the aqueous solution was extracted twice with ethyl acetate. The combined organic layers were washed with aqueous hydrochloric acid, water, saturated aqueous sodium chloride and then dried over magnesium sulfate. The ethyl acetate solution was then concentrated under vacuum to give an oil (30 g) which was purified by silica gel chromatography (5% ethyl acetate/hexanes eluent) to give the product. Concentration under high vacuum afforded 21 g (79%) of the desired hexanoate ester as an oil. The product was taken up in hexanes and filtered through a pad of basic alumina. The filtrate was concentrated under high vacuum to give 16.9 g of analytically pure product. the aqueous solution was extracted twice with ethyl acetate The combined organic layers were washed with aqueous hydrochloric acid, water, saturated aqueous sodium chloride dried over magnesium sulfate The ethyl acetate solution was then concentrated under vacuum

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

Procedure: A stirred solution of 18.8 g (0.1 mol) of diisopropyl malonate in 100 ml carbon tetrachloride was cooled in an ice bath and 15.8 g (0.1 mol) bromine was added dropwise over a 90 minute period. The ice bath was removed and the reaction stirred at room temperature for 20 hours. The reaction solution was concentrated in vacuo and the resulting residue distilled to yield 16.1 g (76%) of the bromomalonate I [H. P. Gallus and A. K. Macbeth, J. Chem. Soc., 1937, 1810-12] as a clear colorless liquid; Bp 51°-2° C./0.1 mm Hg. CI/MS: MH+ 267. 1H-NMR (300 MHZ) spectral data was consistent with the desired structure. Using the same procedure as for 2-(2,4,6-triiodophenoxy)-1,3-propanedioic acid, diethyl ester, but substituting methylene chloride for ethyl acetate in the aqueous extraction, 2-(2,4,6-triiodophenoxy)-1,3-propanedioic acid, diisopropyl ester was prepared from 8.6 g (0.03 mol) of malonate I, 107 g (0.03 mol) of 2,4,6-triiodophenol, 4.5 g (0.03 mol) of milled anhydrous potassium carbonate and 30 ml of dimethylformamide in 69% yield as a tan oil; bp>65° C./0.65 mm Hg after chromatography (hexanes to 5% ether in hexanes). in the aqueous extraction, 2-(2,4,6-triiodophenoxy)-1,3-propanedioic acid, diisopropyl ester

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A stirred mixture of 70.8 g (0.15 mol) of 2,4,6-triiodophenol, 39.0 g (0.15 mol) of diethyl bromomalonate and 20.7 g (0.15 mol) of milled anhydrous potassium carbonate in 200 ml of dry dimethylformamide was heated at 100° C. under argon for 5 hours. The mixture was cooled and concentrated in vacuo. The resulting residue was combined with 300 ml of ice-cold water and the oily product was extracted with ethyl acetate (1×300 ml), 3×100 ml). The combined ethyl acetate extracts were dried (MgSO4) and concentrated in vacuo to a dark oil. The oil was purified by chromatography (eluted by hexanes to 20% diethyl ether in hexanes) to yield 60.2 g (64%) of product as a light cream-colored solid. The mixture was cooled concentrated in vacuo the oily product was extracted with ethyl acetate (1×300 ml), 3×100 ml) The combined ethyl acetate extracts were dried (MgSO4) concentrated in vacuo to a dark oil The oil was purified by chromatography (eluted by hexanes to 20% diethyl ether in hexanes)

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of triiodophenol (1.0 g, 2.1 mmol) and potassium carbonate (0.35 g, 2.54 mmol, 1.2 eq) in 4 ml of dimethylformamide was heated at 70° C. for 1 hr and then cooled to room temperature. 1-bromo-3-octyne was added in a single portion and the mixture was stirred for 1 hr. The reaction mixture was poured into water and the precipitated solids were collected by filtration. The collected solid was recrystallized from methanol to give 0.39 g (32%) of desired product. Mp 45° C.-49° C. cooled to room temperature the precipitated solids were collected by filtration The collected solid was recrystallized from methanol

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of triiodophenol (1.0 g, 2.1 mmol) and potassium carbonate (0.35 g, 2.54 mmol, 1.2 eq) in 4 ml of dimethylformamide was heated at 70° C. for 1 hr and then cooled to room temperature. 1-bromo-3-octyne was added in a single portion and the mixture was stirred for 1 hr. The reaction mixture was poured into water and the precipitated solids were collected by filtration. The collected solid was recrystallized from methanol to give 0.39 g (32%) of desired product. Mp 45° C.-49° C. cooled to room temperature the precipitated solids were collected by filtration The collected solid was recrystallized from methanol

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of triiodophenol (10.0 g, 21.2 mmol), milled potassium carbonate (3.1 g, 22.5 mmol, 1.06 eq) and geranyl bromide (4.0 ml, 20.2 mmol) in dimethyl formamide (25 ml) was heated to 50° C. for 2 hrs and cooled. The mixture was poured into 300 ml of water and extracted with ethyl acetate. The ethyl acetate extract was filtered through a short pad of silica gel, then alumina, eluting with ethyl acetate-hexanes (1:1). The eluent was concentrated under high vacuum to give the product in 87% yield as an oil. cooled extracted with ethyl acetate The ethyl acetate extract was filtered through a short pad of silica gel alumina, eluting with ethyl acetate-hexanes (1:1) The eluent was concentrated under high vacuum to give the product in 87% yield as an oil

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of citronellol (4.5 g, 28.8 mmol) and triethylamine (5.2 ml, 34.6 mmol, 1.2 eq) in dichloromethane (50 ml) cooled to 0° C. was added dropwise, a solution of methanesulfonyl chloride (2.46 ml, 28.8 mmol) in dichloromethane (50 ml). The solution was stirred for 1 hr at 0° C. under nitrogen and then water was added. The dichloromethane layer was dried over magnesium sulfate after washing with saturated aqueous sodium chloride and then concentrated in vacuo to give an oil. 1H-NMR (300 MHZ) spectrum of the oil indicated the desired methanesulfonate ester. The methanesulfonate ester was added to a stirred mixture of 2,4,6-triiodophenol (13.6 g, 28.8 mmol) and potassium carbonate (4.0 g, 28.8 mmol) in dimethylformamide (50 ml). The mixture was heated to 100° C. for 30 minutes and cooled to room temperature. The crude product was isolated by partitioning the reaction mixture between water and dichloromethane. The organic layer was concentrated under vacuum to give an oil. The oil was purified by flashing through basic alumina with hexanes to give the desired product in 15% yield as a light-sensitive oil. was added dropwise The dichloromethane layer was dried over magnesium sulfate after washing with saturated aqueous sodium chloride concentrated in vacuo to give an oil The mixture was heated to 100° C. for 30 minutes cooled to room temperature The crude product was isolated by partitioning the reaction mixture between water and dichloromethane The organic layer was concentrated under vacuum to give an oil The oil was purified