cyclohexylmethanol

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:

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

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

Procedure: Following transesterification General Procedure AB above and using N-(3,4-dichlorophenyl)alanine methyl ester (from Example A9 above) and cyclohexylmethanol (Aldrich), the title compound was prepared.

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

Procedure: (3S,8S)-8-{(S)-2-[4-(2,3-Dimethyl-pyridin-4-yl)-phenyl]-1-methoxycarbonyl-ethylcarbamoyl}-3-(3-hydroxy-phenyl)-2,3,8,9-tetrahydro-6H-[1,4]dioxino[2,3-g]isoquinoline-7-carboxylic acid tert-butyl ester (25 mg), cyclohexyl methanol (12 mg), triphenyl phosphine (38 mg) were taken in 1 mL of anhydrous DCM and cooled to 0° C. Diisobutyl azodicarboxylate (22 mg) was added and reaction was warmed to room temperature and stirred for 4 hours. After the completion, reaction was loaded onto a silica gel column (1:1 EtOAc:hexanes to 4% MeOH in 1:1 EtOAc:hexanes) gave (3S,8S)-3-(3-cyclohexylmethoxy-phenyl)-8-{(S)-2-[4-(2,3-dimethyl-pyridin-4-yl)-phenyl]-1-methoxycarbonyl-ethylcarbamoyl}-2,3,8,9-tetrahydro-6H-[1,4]dioxino[2,3-g]isoquinoline-7-carboxylic acid tert-butyl ester (27 mg). This was taken in 2 mL anhydrous DCM and cooled 0° C., HCl (0.5 mL, 4N in dioxane) was added and stirred at room temperature for 1 hour. All volatiles were evaporated and the residue was precipitated from DCM/hexanes to get (S)-2-{[(3S,8S)-3-(3-cyclohexylmethoxy-phenyl)-2,3,6,7,8,9-hexahydro-[1,4]dioxino[2,3-g]isoquinoline-8-carbonyl]-amino}-3-[4-(2,3-dimethyl-pyridin-4-yl)-phenyl]-propionic acid methyl ester dihydrochloride (25 mg). reaction was warmed to room temperature After the completion, reaction

Conditions: temp:20.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Cyclohexyl methanol (2.0 g, 17.5 mmol), ethyl 3-hydroxybenzoate (2.6 g, 15.8 mmol), tri-n-butyl phosphin (5.3 g, 26 mmol), and ADDP (6.6 g, 26 mmol) were dissolved in dry THF (100 ml) and stirred overnight at 20° C. under N2. Water (100 ml) is added, and the resulting solution is extracted with DCM (3×100 ml). The combined organic layers were washed with water (100 ml), dried (MgSO4) and evaporated. The crude mixture was purified by preparative HPLC to give 1.8 g of the title compound. LC-MS (m/z): 264 (M+2). the resulting solution is extracted with DCM (3×100 ml) The combined organic layers were washed with water (100 ml) dried (MgSO4) evaporated The crude mixture was purified by preparative HPLC