Formaldehyde → n-[(1r)-1-[(4-Chlorophenyl)methyl]-2-(4-{2-[(methylsulfonyl)amino]phenyl}piperazinyl)-2-oxoethyl](1-methyl(2-piperidyl))carboxamide

HRID 228091Notes

Reaction equation

HRID 228091 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C@@H:9]([NH:29][C:30]([CH:32]2[CH2:37][CH2:36][CH2:35][CH2:34][NH:33]2)=[O:31])[C:10]([N:12]2[CH2:17][CH2:16][N:15]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][C:19]=3[NH:24][S:25]([CH3:28])(=[O:27])=[O:26])[CH2:14][CH2:13]2)=[O:11])=[CH:4][CH:3]=1.F[C:39](F)(F)C([O-])=O.CCN(C(C)C)C(C)C.C=O.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+]>C(Cl)Cl.C(Cl)CCl>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:8][C@@H:9]([NH:29][C:30]([CH:32]2[CH2:37][CH2:36][CH2:35][CH2:34][N:33]2[CH3:39])=[O:31])[C:10]([N:12]2[CH2:13][CH2:14][N:15]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][C:19]=3[NH:24][S:25]([CH3:28])(=[O:27])=[O:26])[CH2:16][CH2:17]2)=[O:11])=[CH:6][CH:7]=1

Participants

8

Reactant 5

HCID 712FormaldehydeHCID 81531DiisopropylethylamineHCID 84468TrifluoroacetateHCID 5049666Sodium triacetoxyborohydrideHCID 10230886n-[(1r)-1-[(4-Chlorophenyl)methyl]-2-(4-{2-[(methylsulfonyl)amino]phenyl}piperazinyl)-2-oxoethyl]-2-piperidylcarboxamide

Product 1

HCID 21060071n-[(1r)-1-[(4-Chlorophenyl)methyl]-2-(4-{2-[(methylsulfonyl)amino]phenyl}piperazinyl)-2-oxoethyl](1-methyl(2-piperidyl))carboxamide

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 6344DichloromethaneSolvent

Procedure

To a round-bottomed flask equipped with magnetic stirring was added N-[(1R)-1-[(4-chlorophenyl)methyl]-2-(4-{2-[(methylsulfonyl)amino]phenyl}piperazinyl)-2-oxoethyl]-2-piperidylcarboxamide, trifluoroacetate (Step 2) (0.16 mmol), ClCH2CH2Cl (1 mL) and DIEA (Aldrich) (0.06 mL, 0.32 mmol). Formaldehyde (Aldrich, 37% aqueous soln) (0.03 mL, 0.33 mmol) was added to the reaction mixture, followed by NaBH(OAc)3 (Aldrich Chemical Company) (52 mg, 0.25 mmol), and the reaction mixture was stirred at RT 18 h. The mixture was diluted with CH2Cl2, and the organic solution was washed with satd NaHCO3 and brine. The organic layer was dried over Na2SO4, filtered and concentrated in vacuo. The crude product was purified by flash column chromatography (silica gel, 5:95 MeOH—CH2Cl2) to give N-[(1R)-1-[(4-chlorophenyl)methyl]-2-(4-{2-[(methylsulfonyl)amino]phenyl}piperazinyl)-2-oxoethyl]-(1-methyl(2-piperidyl))carboxamide as a white solid, (71 mg) (two diastereomers). MS (ESI, pos. ion) m/z: 562 (M+H); (ESI, neg. ion) m/z: 560 (M−H). Calc'd for C27H36ClN5O4S: 561.22.

Workup

  1. customTo a round-bottomed flask equipped
  2. stirringthe reaction mixture was stirred at RT 18 h
  3. washthe organic solution was washed with satd NaHCO3 and brine
  4. dry with materialThe organic layer was dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe crude product was purified by flash column chromatography (silica gel, 5:95 MeOH—CH2Cl2)

Sources & evidence

ORD record
ord-1053933c914141eda3a69afd0d186111
Source dataset
uspto-grants-2009_07
Patent number
US07560460B2

Reaction notes

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