O-[tert-butyl(diphenyl)silyl]hydroxylamine

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

Procedure: According to the procedure described in Example 1(b) for the preparation of 3(R)-t-butyloxycarbonylamino-N-(2,2-dimethyl-1(S)-(methylcarbamoyl)propyl)succinamic acid benzyl ester, N-(2,2-dimethyl-1(S)-hydroxymethyl-propyl)-3(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamic acid (prepared as described in Example 5(a)) and t-butyldiphenylsiloxyamine were coupled with TBTU. Flash column chromatography with 0-5% MeOH/CH2Cl2 gradient eluant furnished in 43% yield N1-t-butyldiphenylsiloxy-N4-[2,2-Dimethyl-1(S)-(hydroxymethyl)propyl]-2(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamide as an amorphous solid.

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

Procedure: According to the procedure described in Example 1(b) for the preparation of 3(R)-t-butyloxycarbonylamino-N-(2,2-dimethyl-1(S)-(methylcarbamoyl)propyl)succinamic acid benzyl ester, N-(2,2-dimethyl-1(S)-hydroxymethyl-propyl)-3(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamic acid (prepared as described in Example 5(a)) and t-butyldiphenylsiloxyamine were coupled with TBTU. Flash column chromatography with 0-5% MeOH/CH2Cl2 gradient eluant furnished in 43% yield N4 -t-butyldiphenylsiloxy-N1 -[2,2-Dimethyl-1(S)-(hydroxymethyl)propyl]-2(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamide as an amorphous solid. 1H NMR (DMSO-d6): δ 10.73 (s, 1H), 8.59 (d, 2H, J=6.3 Hz), 7.85-7.70 (m, 5H), 7.65-7.56 (m, 6H), 7.45-7.34 (m, 6H), 7.29 (s, 1H), 6.79 (s, 1H), 6.43 (s, 1H), 5.20-5.14 (m, 1H), 4.38-4.36 (m, 1H), 3.54-3.50 (m, 2H), 2.82-2.70 (m, 1H), 0.99 (s, 9H), 0.84 (s, 9H). Anal: Calculated for C41H48N4O4Si.0.4 H2O: c, 70.74; H, 7.07; N, 8.05. Found: C, 70.83; H, 7.04; N, 8.33.

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

Procedure: According to the procedure described in Example 1(b) for the preparation of 3(R)-t-butyloxycarbonylamino-N-(2,2-dimethyl-1(S)-(methylcarbamoyl)propyl)succinamic acid benzyl ester, N-(2,2-dimethyl-1(S)-hydroxymethyl-propyl)-3(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamic acid (prepared as described in Example 5(a)) and t-butyldiphenylsiloxyamine were coupled with TBTU. Flash column chromatography with 0-5% MeOH/CH2Cl2 gradient eluant furnished in 43% yield N4 -t-butyldiphenylsiloxy-N1 -[2,2-Dimethyl-1(S)-(hydroxymethyl)propyl]-2(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamide as an amorphous solid. 1H NMR (DMSO-d6): δ 10.73 (s, 1H), 8.59 (d, 2H, J=6.3 Hz), 7.85-7.70 (m, 5H), 7.65-7.56 (m, 6H), 7.45-7.34 (m, 6H), 7.29 (s, 1H), 6.79 (s, 1H), 6.43 (s, 1H), 5.20-5.14 (m, 1H), 4.38-4.36 (m, 1H), 3.54-3.50 (m, 2H), 2.82-2.70 (m, 1H), 0.99 (s, 9H), 0.84 (s, 9H). Anal: Calculated for C41H48N4O4Si.0.4 H2O: c, 70.74; H, 7.07; N, 8.05. Found: C, 70.83; H, 7.04; N, 8.33.

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

Procedure: According to the procedure described in Example 1(b) for the preparation of 3(R)-t- butyloxycarbonylamino-N-(2,2-dimethyl-1(S)-(methylcarbamoyl)propyl)succinamic acid benzyl ester, N-(2,2-dimethyl-1(S)-hydroxymethyl-propyl)-3(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamic acid (prepared as described in Example 5(a)) and t-butyldiphenylsiloxyamine were coupled with TBTU. Flash column chromatography with 0-5% MeOH/CH2Cl2 gradient eluant fumished in 43% yield N4-t-butyldiphenylsiloxy-N1-[2,2-Dimethyl-1(S)-(hydroxymethyl)propyl]-2(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamide as an amorphous solid. 1H NMR (DMSO-d6): δ 10.73 (s, 1H), 8.59 (d, 2H, J=6.3 Hz), 7.85-7.70 (m, 5H), 7.65-7.56 (m, 6H), 7.45-7.34 (m, 6H), 7.29 (s, 1H), 6.79 (s, 1H), 6.43 (s, 1H), 5.20-5.14 (m, 1H), 4.38-4.36 (m, 1H), 3.54-3.50 (m, 2H), 2.82-2.70 (m, 1H), 0.99 (s, 9H), 0.84 (s, 9H). Anal: Calculated for C41H48N4O4Si•0.4 H2O: C, 70.74; H, 7.07; N, 8.05. Found: C, 70.83; H, 7.04; N, 8.33.

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

Procedure: According to the procedure described in Example 1(b) for the preparation of 3(R)-t-butyloxycarbonylamino-N-(2,2-dimethyl-1(S)-(methylcarbamoyl)propyl)succinamic acid benzyl ester, N-(2,2-dimethyl-1(S)-hydroxymethyl-propyl)-3(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamic acid (prepared as described in Example 5(a)) and t-butyldiphenylsiloxyamine were coupled with TBTU. Flash column chromatography with 0-5% MeOH/CH2Cl2 gradient eluant furnished in 43% yield N1-t-butyldiphenylsiloxy-N4-[2,2-Dimethyl-1(S)-(hydroxymethyl)propyl]-2(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamide as an amorphous solid.

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

Procedure: According to the procedure described in Example 1(b) for the preparation of 3(R)-t-butyloxycarbonylamino-N-(2,2-dimethyl-1(S)-(methylcarbamoyl)propyl)succinamic acid benzyl ester, N-(2,2-dimethyl-1(S)-hydroxymethyl-propyl)-3(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamic acid (prepared as described in Example 5(a)) and t-butyldiphenylsiloxyamine were coupled with TBTU. Flash column chromatography with 0-5% MeOH/CH2Cl2 gradient eluant furnished in 43% yield N1-t-butyldiphenylsiloxy-N4-[2,2-Dimethyl-1(S)-(hydroxymethyl)propyl]-2(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamide as an amorphous solid.

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

Procedure: To a solution of 3(S)-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxylic acid (293 mg, 0.62 mmol) and O-(tert-butyldiphenylsilyl)hydroxylamine (0.22 g, 0.8 mmol) in 5 mL of dichloromethane was added EDC (132 mg, 0.69 mmol). After 18 hours at 25° C., the mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane. The aqueous layer was extracted twice with dichloromethane, and the combined organic layers were washed with brine, dried over sodium sulfate, and concentrated. The residue was purified by chromatography on silica gel, eluting with a gradient from dichloromethane to 5% methanol in dichloromethane, to provide 3(S)-N-(tert-butyldiphenylsilyl)oxy-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxamide (40 mg, 8%). FAB+MS Calcd for M+Cs+=859.1308 Obs 859.1274; 1HNMR (d6-DMSO): δ 10.81 (s, 1H), 8.17 (s, 1H), 7.74 (s, 1H), 7.67-7.61 (m, 8H), 7.45-7.30 (m, 6H), 7.10 (d, 2H, J=8.83 Hz), 7.00 (d, 2H, J=8.46 Hz), 6.94 (s, 1H), 4.06 (s, 1H), 3.95-3.89 (bm, 1H), 3.77-3.73 (bm, 1H), 2.87-2.78 (bm, 1H), 1.28 (s, 3H), 0.99 (s, 9H), 0.61 (s, 3H) the mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane The aqueous layer was extracted twice with dichloromethane the combined organic layers were washed with brine dried over sodium sulfate concentrated The residue was purified by chromatography on silica gel eluting with a gradient from dichloromethane to 5% methanol in dichloromethane

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

Procedure: To a solution of 3(S)-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxylic acid (293 mg, 0.62 mmol) and O-(tert-butyldiphenylsilyl)hydroxylamine (0.22 g, 0.8 mmol) in 5 mL of dichloromethane was added EDC (132 mg, 0.69 mmol). After 18 hours at 25° C., the mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane. The aqueous layer was extracted twice with dichloromethane, and the combined organic layers were washed with brine, dried over sodium sulfate, and concentrated. The residue was purified by chromatography on silica gel, eluting with a gradient from dichloromethane to 5% methanol in dichloromethane, to provide 3(S)-N-(tert-butyldiphenylsilyl)oxy-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxamide (40 mg, 8%). FAB+MS Calcd for M+Cs+=859.1308 Obs 859.1274; 1HNMR (d6-DMSO): δ 10.81 (s, 1H), 8.17 (s, 1H), 7.74 (s, 1H), 7.67-7.61 (m, 8H), 7.45-7.30 (m, 6H), 7.10 (d, 2H, J=8.83 Hz), 7.00 (d, 2H, J=8.46 Hz), 6.94 (s, 1H), 4.06 (s, 1H), 3.95-3.89 (bm, 1H), 3.77-3.73 (bm, 1H), 2.87-2.78 (bm, 1H), 1.28 (s, 3H), 0.99 (s, 9H), 0.61 (s, 3H) the mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane The aqueous layer was extracted twice with dichloromethane the combined organic layers were washed with brine dried over sodium sulfate concentrated The residue was purified by chromatography on silica gel eluting with a gradient from dichloromethane to 5% methanol in dichloromethane

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

Procedure: To a solution of 3(S)-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxylic acid (293 mg, 0.62 mmol) and O-(tert-butyldiphenylsilyl)hydroxylamine (0.22 g, 0.8 mmol) in 5 mL of dichloromethane was added EDC (132 mg, 0.69 mmol). After 18 hours at 25° C., the mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane. The aqueous layer was extracted twice with dichloromethane, and the combined organic layers were washed with brine, dried over sodium sulfate, and concentrated. The residue was purified by chromatography on silica gel, eluting with a gradient from dichloromethane to 5% methanol in dichloromethane, to provide 3(S)-N-(tert-butyldiphenylsilyl)oxy-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxamide (40 mg, 8%). FAB+MS Calcd for M+Cs+=859.1308 Obs 859.1274; 1HNMR (d6-DMSO): δ 10.81 (s, 1H), 8.17 (s, 1H), 7.74 (s, 1H), 7.67-7.61 (m, 8H), 7.45-7.30 (m, 6H), 7.10 (d, 2H, J=8.83 Hz), 7.00 (d, 2H, J=8.46 Hz), 6.94 (s, 1H), 4.06 (s, 1H), 3.95-3.89 (bm, 1H), 3.77-3.73 (bm, 1H), 2.87-2.78 (bm, 1H), 1.28 (s, 3H), 0.99 (s, 9H), 0.61 (s, 3H). the mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane The aqueous layer was extracted twice with dichloromethane the combined organic layers were washed with brine dried over sodium sulfate concentrated The residue was purified by chromatography on silica gel eluting with a gradient from dichloromethane to 5% methanol in dichloromethane

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

Procedure: According to the procedure described in Example 1(b) for the preparation of 3(R)-t-butyloxycarbonylamino-N-(2,2-dimethyl-1(S)-(methylcarbamoyl)propyl)succinamic acid benzyl ester, N-(2,2-dimethyl-1(S)-hydroxymethyl-propyl)-3(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamic acid (prepared as described in Example 5(a)) and t-butyldiphenylsiloxyamine were coupled with TBTU. Flash column chromatography with 0-5% MeOH/CH2Cl2 gradient eluant furnished in 43% yield N4-t-butyldiphenylsiloxy-N1-[2,2-Dimethyl-1(S)-(hydroxymethyl)propyl]-2(R)-[3-[4-(pyridin-4-yl)phenyl]-1H-pyrrol-1-yl]succinamide as an amorphous solid. 1H NMR (DMSO-d6): δ 10.73 (s, 1H), 8.59 (d, 2H, J=6.3 Hz), 7.85-7.70 (m, 5H), 7.65-7.56 (m, 6H), 7.45-7.34 (m, 6H), 7.29 (s, 1H), 6.79 (s, 1H), 6.43 (s, 1H), 5.20-5.14 (m, 1H), 4.384.36 (m, 1H), 3.54-3.50 (m, 2H), 2.82-2.70 (m, 1H), 0.99 (s, 9H), 0.84 (s, 9H). Anal: Calculated for C41H48N4O4Si.0.4H2O: C, 70.74; H, 7.07; N, 8.05. Found: C, 70.83; H, 7.04; N, 8.33.

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

Procedure: To a solution of 3(S)-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxylic acid (293 mg, 0.62 mmol) and O-(tert-butyldiphenylsilyl)hydroxylamine (0.22 g, 0.8 mmol) in 5 mL of dichloromethane was added EDC (132 mg, 0.69 mmol). After 18 hours at 25° C., the mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane. The aqueous layer was extracted twice with dichloromethane, and the combined organic layers were washed with brine, dried over sodium sulfate, and concentrated. The residue was purified by chromatography on silica gel, eluting with a gradient from dichloromethane to 5% methanol in dichloromethane, to provide 3(S)-N-(tert-butyldiphenylsilyl)oxy-4-(4-(4-(furan-3-yl)phenoxy)benzenesulfonyl-tetrahydro-2H-1,4-thiazine-3-carboxamide (40 mg, 8%). FAB+MS Calcd for M+Cs+ =859.1308 Obs 859.1274; 1HNMR (d6 -DMSO): δ10.81 (s, 1H), 8.17 (s, 1H), 7.74 (s, 1H), 7.67-7.61 (m, 8H), 7.45-7.30 (m, 6H), 7.10 (d, 2H, J=8.83 Hz), 7.00 (d, 2H, J=8.46 Hz), 6.94 (s, 1H), 4.06 (s, 1H), 3.95-3.89 (bm, 1H), 3.77-3.73 (bm, 1H), 2.87-2.78 (bm, 1H), 1.28 (s, 3H), 0.99 (s, 9H), 0.61 (s, 3H) the mixture was partitioned between 1 N aq. sodium bisulfate and dichloromethane The aqueous layer was extracted twice with dichloromethane the combined organic layers were washed with brine dried over sodium sulfate concentrated The residue was purified by chromatography on silica gel eluting with a gradient from dichloromethane to 5% methanol in dichloromethane

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

Procedure: Under nitrogen, a 50 L extractor was charged with dichloromethane (20 L), triethylamine (7.1 L, 50.9 mol), and hydroxylamine hydrochloride (1769 g, 25.5 mol). The mixture was stirred for 45 minutes then tert-butylchlorodiphenylsilane (7 kg, 25.5 mol) was added in seven 1 kg portions over 40 minutes. Additional dichloromethane (10 L) was added, filling the vessel to capacity. The joints were stoppered and the mixture stirred at 20° C. for 5 days. The resulting thick white suspension was filtered to remove the precipitate (mostly triethylamine hydrochloride). The filtrate was concentrated to a thick paste by rotary evaporation on two separate evaporators. Ethyl acetate (4 L) was added to each portion and evaporation continued until 2 L of solvent were condensed. The suspension from each half was combined in the 50-L reactor, ethyl acetate (28 L) was added, and the mixture was stirred for 15 minutes. The mixture was filtered (removing the remaining triethylamine hydrochloride) and the solvent evaporated (again using two rotary evaporators). When most of the solvent was removed, hexane (4 L) was added to each portion and evaporation continued until 2 L of solvent were condensed. The two halves were combined in the 50-L reactor, hexane (20 L) was added, and the mixture was stirred for 15 minutes. The resulting white solid was collected by filtration, washed with hexanes, and dried in a vacuum oven at 40° C., giving 4780 g (69% yield) of O-(tert-butyldiphenylsilyl)-hydroxylamine. the mixture stirred at 20° C. for 5 days The resulting thick white suspension was filtered to remove the precipitate (mostly triethylamine hydrochloride) The filtrate was concentrated to a thick paste by rotary evaporation on two separate evaporators Ethyl acetate (4 L) was added to each portion and evaporation condensed was added the mixture was stirred for 15 minutes The mixture was filtered ( removing the remaining triethylamine hydrochloride) and the solvent evaporated ( When most of the solvent was removed hexane (4 L) was added to each portion and evaporation condensed was added the mixture was stirred for 15 minutes The resulting white solid was collected by filtration washed with hexanes dried in a vacuum oven at 40° C.