2-(1,3-dioxolan-2-yl)ethanamine

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

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 69.63 g of 2-chloro-3-(phenylmethoxy)propanoyl chloride (prepared according to the procedure described in Inorg. Chem., 31. 2422, 1992) (0.299 mol) in 90 ml of CHCl3 was added to a solution of 35.49 g of 2-(2-aminoethyl)-1,3-dioxolane (prepared according to the procedure described in EXAMPLE 4) (0.303 mol) and to 60.3 g of triethylamine (83 ml; 0.596 mol) in 100 ml of CHCl3 under inert atmosphere, keeping the temperature at 0°-5° C. The reaction mixture was stirred for 5 h at 25° C., then was washed with H2O. The organic phase was dried and evaporated to dryness, the residue was purified by flash chromatography. 61.68 g of the desired product (0.197 mol) were obtained. prepared at 0°-5° C was washed with H2O The organic phase was dried evaporated to dryness the residue was purified by flash chromatography

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 69.63 g of 2-chloro-3-(phenylmethoxy)propanoyl chloride (prepared according to the procedure described in Inorg. Chem., 31. 2422, 1992) (0.299 mol) in 90 ml of CHCl3 was added to a solution of 35.49 g of 2-(2-aminoethyl)-1,3-dioxolane (prepared according to the procedure described in EXAMPLE 4) (0.303 mol) and to 60.3 g of triethylamine (83 ml; 0.596 mol) in 100 ml of CHCl3 under inert atmosphere, keeping the temperature at 0°-5° C. The reaction mixture was stirred for 5 h at 25° C., then was washed with H2O. The organic phase was dried and evaporated to dryness, the residue was purified by flash chromatography. 61.68 g of the desired product (0.197 mol) were obtained. prepared at 0°-5° C was washed with H2O The organic phase was dried evaporated to dryness the residue was purified by flash chromatography

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

Procedure: To a solution of 2-bromopyridine-3-carbaldehyde (3.53 g, 19.0 mmol, 1.0 eq) (Melnyk et al., Synthetic Commun. 23(19):2727-2730, 1993) in 1,2-dichloroethane (50 mL) was added 2-(1,3-dioxolan-2-yl)ethylamine (TCI-GR, 2.67 g, 22.8 mmol, 1.2 eq), sodium triacetoxyborohydride (Aldrich, 1.61 g, 76 mmol, 4.0 eq) and glacial acetic acid (1.14 g, 19 mmol, 1.0 eq). The reaction mixture was stirred under nitrogen at room temperature for 2 h. The reaction was quenched with 1.0 N aqueous NaOH to about pH 8 and the solution was extracted with EtOAc (200 mL×3). The organic extracts were washed with saturated NaCl, dried with MgSO4, filtered and concentrated. Flash column chromatography (silica gel, 0-10% EtOAc-Hexane) afforded the title compound as a colorless oil. MS m/z 377 (Br=79, M+H), 379 (Br=81, M+H). The reaction was quenched with 1.0 N aqueous NaOH to about pH 8 the solution was extracted with EtOAc (200 mL×3) The organic extracts were washed with saturated NaCl dried with MgSO4 filtered concentrated

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

Procedure: A mixture of 3-fluoro-N,N-bis(3-methylbutyl)-4-nitrobenzamide prepared according to Example A1 (1.86 g, 1 eq), 2-(2-aminoethyl)-1,3-dioxolane (0.8 g, 1.2 eq) and potassium carbonate (1.58 g, 2 eq) in acetonitrile (150 ml) is heated under reflux for 3 hours then concentrated under reduced pressure at 40° C. The residue is taken up in dichloromethane (150 ml) and water (60 ml). After decantation and extractions, the combined organic phases are washed with salt water, dried over Na2SO4 then concentrated under reduced pressure at 40° C. Purification of the residue by flash chromatography on silica gel (eluent: heptane/ethyl acetate 8:2 to 7:3) produces the expected compound in the form of an orange-yellow oil (2.4 g; 98% yield). prepared is heated under reflux for 3 hours then concentrated under reduced pressure at 40° C After decantation and extractions the combined organic phases are washed with salt water dried over Na2SO4 then concentrated under reduced pressure at 40° C Purification of the residue by flash chromatography on silica gel (eluent: heptane/ethyl acetate 8:2 to 7:3)

Conditions: temp:25.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 69.63 g of 2-chloro-3-(phenylmethoxy)propanoyl chloride (prepared according to the procedure described in Inorg. Chem., 31. 2422, 1992) (0.299 mol) in 90 ml of CHCl3 was added to a solution of 35.49 g of 2-(2-aminoethyl)-1,3-dioxolane (prepared according to the procedure described in EXAMPLE 4) (0.303 mol) and to 60.3 g of triethylamine (83 ml; 0.596 mol) in 100 ml of CHCl3 under inert atmosphere, keeping the temperature at 0°-5° C. The reaction mixture was stirred for 5 h at 25° C., then was washed with H2O. The organic phase was dried and evaporated to dryness, the residue was purified by flash chromatography. 61.68 g of the desired product (0.197 mol) were obtained. prepared at 0°-5° C was washed with H2O The organic phase was dried evaporated to dryness the residue was purified by flash chromatography

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

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

Procedure: 5-(5-Ethyl-2-methyl-6-oxo-1,6-dihydropyridin-3-yl)thiophene-2-sulfonyl chloride is reacted with 2-(1,3-dioxolan-2-yl)ethylamine as described in Step 5, Example 24 to give the title compound as a solid (50.5% yield). LC/MS: RT 2.58 min; m/e 399 (M+H); 1H NMR (δ, ppm): 11.8 (1H, s), 7.8 (1H, br s); 7.56 (1H, d); 7.35 (1H, s), 7.18 (1H, d), 4.8 (1H, t), 3.8 (2H, m), 3.75 (2H, m), 2.95 (2H, m), 2.4 (2H, q), 2.36 (3H, s), 1.75 (2H, m), 1.08 (3H, t).

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

Procedure: A solution of 2-(2-aminoethyl)-1,3-dioxolane (2.4 g, 20.6 mmol) and 4,5-dibromopyrrol-2-yl trichloromethyl ketone (7.6 g, 20.5 mmol) in 30 mL of acetonitrile was stirred at room temperature for 16 h. The reaction mixture was filtered and the precipitate 11 (6.8 g, 90%) was collected as a colorless solid: mp 155-157° C.; 1H NMR (CDCl3) d 1.99 (dt, 2H, J=6.0, 4.2), 3.61 (dt, 2H, J=6.0, 5.6), 3.92 (m, 2H), 4.05 (m, 2H), 5.00 (t, 1H, J=4.2), 6.51 (d, 1H, J=2.8), 6.66 (bs, 1H), 10.57 (bs, 1H); 13C NMR (CD3COCD3) d 34.3 (e), 35.5 (e), 65.4×2 (e), 99.4 (e), 103.4 (o), 105.4 (e), 113.0 (o), 129.1 (e), 160.0 (e); IR (nujol) 3358, 1646, 1569, 1412, 1372 cm−1; UV (CH3OH) lmax 275, 233, 214 (sh) nm; MS m/z (relative intensity) 371 (M++5, 50), 369 (M++3, 100), 367 (M++1, 50), 289 (13), 118 (25), 101 (50), 73 (30); Anal. Calcd for C8H10N2O2Br2: C, 32.63; H, 3.29; N, 7.61; Found: C, 32.77; H, 3.17; N, 7.51. The reaction mixture was filtered the precipitate 11 (6.8 g, 90%) was collected as a colorless solid

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

Procedure: A mixture of 3-fluoro-N,N-bis(3-methylbutyl)-4-nitrobenzamide prepared according to Example A1 (1.86 g, 1 eq), 2-(2-aminoethyl)-1,3-dioxolane (0.8 g, 1.2 eq) and potassium carbonate (1.58 g, 2 eq) in acetonitrile (150 ml) is heated under reflux for 3 hours then concentrated under reduced pressure at 40° C. The residue is taken up in dichloromethane (150 ml) and water (60 ml). After decantation and extractions, the combined organic phases are washed with salt water, dried over Na2SO4 then concentrated under reduced pressure at 40° C. Purification of the residue by flash chromatography on silica gel (eluent:heptane/ethyl acetate 8:2 to 7:3) produces the expected compound in the form of an orange-yellow oil (2.4 g; 98% yield). prepared is heated under reflux for 3 hours then concentrated under reduced pressure at 40° C After decantation and extractions the combined organic phases are washed with salt water dried over Na2SO4 then concentrated under reduced pressure at 40° C Purification of the residue by flash chromatography on silica gel (eluent:heptane/ethyl acetate 8:2 to 7:3)

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

Procedure: A mixture of 3-fluoro-N,N-bis(3-methylbutyl)-4-nitrobenzamide prepared according to Example A1 (1.86 g, 1 eq), 2-(2-aminoethyl)-1,3-dioxolane (0.8 g, 1.2 eq) and potassium carbonate (1.58 g, 2 eq) in acetonitrile (150 ml) is heated under reflux for 3 hours then concentrated under reduced pressure at 40° C. The residue is taken up in dichloromethane (150 ml) and water (60 ml). After decantation and extractions, the combined organic phases are washed with salt water, dried over Na2SO4 then concentrated under reduced pressure at 40° C. Purification of the residue by flash chromatography on silica gel (eluent: heptane/ethyl acetate 8:2 to 7:3) produces the expected compound in the form of an orange-yellow oil (2.4 g; 98% yield). prepared is heated under reflux for 3 hours then concentrated under reduced pressure at 40° C After decantation and extractions the combined organic phases are washed with salt water dried over Na2SO4 then concentrated under reduced pressure at 40° C Purification of the residue by flash chromatography on silica gel (eluent: heptane/ethyl acetate 8:2 to 7:3)

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

Procedure: Prepared as described for N-({6-[(3-fluorophenyl)sulfonyl]-1,2,3,4-tetrahydro[1]benzofuro[2,3-c]pyridin-1-yl}methyl)acetamide using tert-butyl (2-{5-[(3-fluorophenyl)sulfonyl]-1-benzofuran-3-yl}ethyl)carbamate and N-[1,3]dioxolan-2-yl-ethylamine)-acetamide, which was prepared from 2-[1,3]dioxolan-2-yl-ethylamine and acetic anhydride. MS m/z 417 [M+H]+. Prepared