hexane-1,6-diol

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:

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

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

Procedure: Instead of pure adipic acid, dicarboxylic acid solution (DCS) has also been used as a starting material for the preparation of 1,6-hexanediol. It is obtained as a waste product in the oxidation of cyclohexane with air to give cyclohexanone and cyclohexanol, by extraction of the oxidized mixture with water.

Conditions: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: a 500-mL, one-necked, round-bottom flask equipped with a magnetic stirrer was charged with 1,6-hexanediol (6.00 g), potassium tert-butoxide (5.413 g) at room temperature. The reaction mixture was stirred for one hour, and then 1-iodopropane (8.63 g) was added. The reaction mixture was heated to 70-80° C. and stirred overnight. The progress of reaction was monitored by TLC (Note 1). After completion of the reaction, water was added to the reaction mixture, and extracted with ethyl acetate (2×100 mL). The combined organic layers were concentrated in vacuo to get the crude product. The crude product was dissolved in dichloromethane and washed with water, and then brine, dried over sodium sulfate. The organic layer was concentrated in vacuo to get the crude product. The crude product was purified by column chromatography using 230-400 mesh silica gel. A solvent gradient of ethyl acetate in hexanes (10-45%) was used to elute the product from the column. All fractions containing the desired pure product were combined and concentrated in vacuo to give pure 6-propyloxy-1-hexanol (lot D-1029-048, 1.9 g, 25%) Completion of the reaction was monitored by thin layer chromatography (TLC); (eluent: 60% ethyl acetate in hexanes). a 500-mL, one-necked, round-bottom flask equipped with a magnetic stirrer stirred overnight The progress of reaction was added to the reaction mixture extracted with ethyl acetate (2×100 mL) The combined organic layers were concentrated in vacuo to get the crude product washed with water brine, dried over sodium sulfate The organic layer was concentrated in vacuo to get the crude product The crude product was purified by column chromatography to elute the product from the column All fractions containing the desired pure product concentrated in vacuo

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

Procedure: A solution of 1,6-hexandiol (44 mmol) in THF (15 mL) is cooled to 0° C. and treated with sodium hydride (44 mmol) followed by tert-butyldimethylsilyl chloride (44 mmol). The reaction mixture is stirred at room temperature overnight. Concentration in vacuo and flash chromatography affords 6-trimethylsiloxy-1-hexanol. To a solution of 6-trimethylsiloxy-1-hexanol (11.6 mmol) in dry dichloromethane (50 mL) is added 2,6-di-tert-butyl-4-methylpyridine (4.6 g, 22.2 mmol) and triflic anhydride (3.7 mL, 22.2 mmol) at 0° C. The reaction is stirred at room temperature for 20 min, poured into water, and extracted with dichloromethane. The combined extracts are dried over anhydrous sodium sulfate and concentrated in vacuo and to afford 6-trimethylsiloxy-1-hexyl triflate (40) which is used without further purification. Concentration in vacuo and flash chromatography

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

Procedure: Compounds (111), (112), (113), (114), (115), (116) and (117) (Table 1) are obtained in analogy to Example 5 using 1-dodecanol, 1-octadecanol, 1-nonadecanol, 1-docosanol, 2-ethylhexanol, 1,6-hexanediol and 1,12-dodecanediol instead of 1-octanol. For the preparation of compounds (116) and (117) only half of an equivalent of 1,6-hexanediol and 1,12-dodecanediol in respect to the compound (109) was used.

Conditions: temp:75.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: a 500-mL, one-necked, round-bottom flask equipped with a magnetic stirrer was charged with 1,6-hexanediol (6.00 g), potassium tert-butoxide (5.413 g) at room temperature. The reaction mixture was stirred for one hour, and then 1-iodopropane (8.63 g) was added. The reaction mixture was heated to 70-80° C. and stirred overnight. The progress of reaction was monitored by TLC (Note 1). After completion of the reaction, water was added to the reaction mixture, and extracted with ethyl acetate (2×100 mL). The combined organic layers were concentrated in vacuo to get the crude product. The crude product was dissolved in dichloromethane and washed with water, and then brine, dried over sodium sulfate. The organic layer was concentrated in vacuo to get the crude product. The crude product was purified by column chromatography using 230-400 mesh silica gel. A solvent gradient of ethyl acetate in hexanes (10-45%) was used to elute the product from the column. All fractions containing the desired pure product were combined and concentrated in vacuo to give pure 6-propyloxy-1-hexanol (lot D-1029-048, 1.9 g, 25%) Completion of the reaction was monitored by thin layer chromatography (TLC); (eluent: 60% ethyl acetate in hexanes). a 500-mL, one-necked, round-bottom flask equipped with a magnetic stirrer stirred overnight The progress of reaction was added to the reaction mixture extracted with ethyl acetate (2×100 mL) The combined organic layers were concentrated in vacuo to get the crude product washed with water brine, dried over sodium sulfate The organic layer was concentrated in vacuo to get the crude product The crude product was purified by column chromatography to elute the product from the column All fractions containing the desired pure product concentrated in vacuo