2-methyl-2-propylpropane-1,3-diol

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

Procedure: Twenty g. of 3,6-dichloropyridazine was alkylated with 44.4 g. of 2-methyl-2-propyl-1,3-propanediol, following the process of Preparation 3 above. In this case the chromatography was run with 3:1 heptane:ethyl acetate as the eluant, and the residue from evaporation of the combined product-containing fractions was recrystallized from diethyl ether/heptane to obtain 0.43 g. of the desired intermediate product, m.p. 99°-100°. the process of Preparation 3 above ethyl acetate as the eluant, and the residue from evaporation of the combined product-containing fractions was recrystallized from diethyl ether/heptane to obtain 0.43 g

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

Procedure: 2.9 g of 2-hydroxyhex-4-en-3-one 63 (25 mmoles) and 3.3 g of 2-methyl-2-propylpropane-1.3-diol 24 (25 mmoles) are acetalized in 50 ml of cyclohexane by AAV 1. After distillation through a spinning band column, a clear light yellow oil is obtained. After distillation through a spinning band column a clear light yellow oil is obtained

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

Procedure: is a known synthetic perfume obtainable from 2-methyl pentanal 23 (cf. following scheme). The educt 23 is reacted with 2 equivalents of formaldehyde in a crossed Canizzaro reaction to form 2-methyl-2-propylpropane-1,3-diol 24. The diol 24 may then be acetalized with 2-methylpentanal 23 to form Troënan® 22.

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

Procedure: Using the method described in Example 1(b), one part per hour of a 72 percent strength by weight aqueous solution of 2-methyl-2-propyl-3-hydroxypropanal is hydrogenated, over the catalyst prepared as described in Example 1(a), at 130° C. and 30 bar, with a throughput of 0.36 part of 2-methyl-2-propyl-3-hydroxypropanal per liter of catalyst per hour. The conversion is 89.5 percent. The hydrogenated material is fractionated through a packed column. After first runnings of water and small amounts of methanol, 2-methylpentanal and 2-methyl-2-propyl-3-hydroxypropanal, 2-methyl-2-propyl-propane-1,3-diol, of boiling point 112°-113° C./5 mbar (melting point 58°-60° C.), is obtained in an amount corresponding to 0.6967 part per hour. This is equivalent to a yield of 95.3% of theory, based on starting material. prepared as described in Example 1(a), at 130° C.

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

Procedure: Using the method described in Example 1(b), one part per hour of a 72 percent strength by weight aqueous solution of 2-methyl-2-propyl-3-hydroxypropanal is hydrogenated, over the catalyst prepared as described in Example 1(a), at 130° C. and 30 bar, with a throughput of 0.36 part of 2-methyl-2-propyl-3-hydroxypropanal per liter of catalyst per hour. The conversion is 89.5 percent. The hydrogenated material is fractionated through a packed column. After first runnings of water and small amounts of methanol, 2-methylpentanal and 2-methyl-2-propyl-3-hydroxypropanal, 2-methyl-2-propyl-propane-1,3-diol, of boiling point 112°-113° C./5 mbar (melting point 58°-60° C.), is obtained in an amount corresponding to 0.6967 part per hour. This is equivalent to a yield of 95.3% of theory, based on starting material. prepared as described in Example 1(a), at 130° C.

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

Procedure: 132 g (1 mol) 2-methyl-2-propyl-1,3-dihydroxypropane, 346.5 g (2.2 mols) 4-nitrochlorobenzene and 140 g powdered sodium hydroxide were reacted in the same manner as was described in Example 1 in 600 ml DMSO. were reacted in the same manner

Conditions: temp:4.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 10 g. (0.076 mol.) of 2-methyl-2-propyl-1,3-propanediol in 200 ml. of dimethoxyethane is added 12.7 g. (0.3 mol.) of 57% sodium hydride followed by an additional 400 ml. of dimethoxyethane. After stirring overnight the suspension is cooled to 4° C and a solution of 31.2 g. (0.27 mol.) of sulfamoyl chloride in 600 ml. of dimethoxyethane is added dropwise. The resulting suspension is stirred overnight at room temperature. The mixture is then filtered, the filtrate is concentrated and the residue washed with heptane. The residue is then chromatographed through SilicAR, CC-7 and eluted with 25% acetone-chloroform. The solid obtained after removel of the solvent is crystallized from a mixture of ethyl acetate-hexane-methylene chloride to afford 2-methyl-2-propyl-1,3-bis-O-sulfamyl-1,3-propanediol, m.p. 92°-94° C. The resulting suspension is stirred overnight at room temperature The mixture is then filtered the filtrate is concentrated the residue washed with heptane The residue is then chromatographed through SilicAR, CC-7 eluted with 25% acetone-chloroform The solid obtained after removel of the solvent is crystallized from a mixture of ethyl acetate-hexane-methylene chloride

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

Procedure: Twenty g. of 3,6-dichloropyridazine was alkylated with 44.4 g. of 2-methyl-2-propyl-1,3-propanediol, following the process of Preparation 3 above. In this case the chromatography was run with 3:1 heptane:ethyl acetate as the eluant, and the residue from evaporation of the combined product-containing fractions was recrystallized from diethyl ether/heptane to obtain 0.43 g. of the desired intermediate product, m.p. 99°-100°. the process of Preparation 3 above ethyl acetate as the eluant, and the residue from evaporation of the combined product-containing fractions was recrystallized from diethyl ether/heptane to obtain 0.43 g

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

Procedure: Twenty g. of 3,6-dichloropyridazine was alkylated with 44.4 g. of 2-methyl-2-propyl-1,3-propanediol, following the process of Preparation 3 above. In this case the chromatography was run with 3:1 heptane:ethyl acetate as the eluant, and the residue from evaporation of the combined product-containing fractions was recrystallized from diethyl ether/heptane to obtain 0.43 g. of the desired intermediate product, m.p. 99°-100°. the process of Preparation 3 above ethyl acetate as the eluant, and the residue from evaporation of the combined product-containing fractions was recrystallized from diethyl ether/heptane to obtain 0.43 g

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

Procedure: 2.9 g of 2-hydroxyhex-4-en-3-one 63 (25 mmoles) and 3.3 g of 2-methyl-2-propylpropane-1.3-diol 24 (25 mmoles) are acetalized in 50 ml of cyclohexane by AAV 1. After distillation through a spinning band column, a clear light yellow oil is obtained. After distillation through a spinning band column a clear light yellow oil is obtained

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

Procedure: is a known synthetic perfume obtainable from 2-methyl pentanal 23 (cf. following scheme). The educt 23 is reacted with 2 equivalents of formaldehyde in a crossed Canizzaro reaction to form 2-methyl-2-propylpropane-1,3-diol 24. The diol 24 may then be acetalized with 2-methylpentanal 23 to form Troënan® 22.

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

Procedure: 132 g (1 mol) 2-methyl-2-propyl-1,3-dihydroxypropane, 346.5 g (2.2 mols) 4-nitrochlorobenzene and 140 g powdered sodium hydroxide were reacted in the same manner as was described in Example 1 in 600 ml DMSO. were reacted in the same manner