Sodium borohydride → 6-({[((3S)-1-{(2S)-2-hydroxy-2-[6-(methyloxy)-1,5-naphthyridin-4-yl]ethyl}-3-pyrrolidinyl)methyl]amino}methyl)-2H-pyrido[3,2-b][1,4]thiazin-3(4H)-one

HRID 639077Notes

Reaction equation

HRID 639077 reaction equation
[NH2:1][CH2:2][C@@H:3]1[CH2:7][CH2:6][N:5]([CH2:8][C@H:9]([C:11]2[C:20]3[C:15](=[CH:16][CH:17]=[C:18]([O:21][CH3:22])[N:19]=3)[N:14]=[CH:13][CH:12]=2)[OH:10])[CH2:4]1.[O:23]=[C:24]1[CH2:29][S:28][C:27]2[CH:30]=[CH:31][C:32]([CH:34]=O)=[N:33][C:26]=2[NH:25]1.[BH4-].[Na+]>C(Cl)Cl.CCO>[OH:10][C@@H:9]([C:11]1[C:20]2[C:15](=[CH:16][CH:17]=[C:18]([O:21][CH3:22])[N:19]=2)[N:14]=[CH:13][CH:12]=1)[CH2:8][N:5]1[CH2:6][CH2:7][C@@H:3]([CH2:2][NH:1][CH2:34][C:32]2[CH:31]=[CH:30][C:27]3[S:28][CH2:29][C:24](=[O:23])[NH:25][C:26]=3[N:33]=2)[CH2:4]1

Participants

6

Reactant 3

HCID 4311764Sodium borohydrideHCID 115935913-Oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazine-6-carbaldehydeHCID 59026179(1S)-2-[(3S)-3-(aminomethyl)-1-pyrrolidinyl]-1-[6-(methyloxy)-1,5-naphthyridin-4-yl]ethanol

Product 1

HCID 590261576-({[((3S)-1-{(2S)-2-hydroxy-2-[6-(methyloxy)-1,5-naphthyridin-4-yl]ethyl}-3-pyrrolidinyl)methyl]amino}methyl)-2H-pyrido[3,2-b][1,4]thiazin-3(4H)-oneYield 54%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of (1S)-2-[(3S)-3-(aminomethyl)-1-pyrrolidinyl]-1-[6-(methyloxy)-1,5-naphthyridin-4-yl]ethanol (72 mg, 0.24 mmole) in dry CH2Cl2 (25 mL) and dry EtOH (20 mL) at RT was added 3-oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazine-6-carbaldehyde (47 mg, 0.24 mmole). After 24 h at RT, was added NaBH4 (10 mg, 0.26 mmole). After 2 h, silica gel (5 g) was added to the reaction solution and the suspension was concentrated under vacuum to a dry solid. Purification on silica (CHCl3/MeOH, 9:1 containing 5% NH4OH) afforded the title compound (61 mg, 54%) as light yellow solid: 1H NMR (400 MHz, CDCl3) δ 8.81 (d, J=4.5 Hz, 1H), 8.23 (d, J=9.1 Hz, 1H), 7.84 (d, J=4.5 Hz, 1H), 7.56 (d, J=8.0 Hz, 1H), 7.12 (d, J=9.1 Hz, 1H), 6.92 (d, J=8.0 Hz, 1H), 5.74 (m, 1H), 4.04 (s, 3H), 3.82 (s, 2H), 3.46 (s, 2H), 3.00-3.11 (m, 1H), 2.58-2.83 (m, 6H), 2.33-2.58 (m, 1H), 2.01 (m, 2H), 1.65 (m, 1H). LC-MS (ES) m/e 481 (M+H)+.

Workup

  1. waitAfter 2 h
  2. additionsilica gel (5 g) was added to the reaction solution
  3. concentrationthe suspension was concentrated under vacuum to a dry solid
  4. customPurification on silica (CHCl3/MeOH, 9:1 containing 5% NH4OH)

Sources & evidence

ORD record
ord-0538814097854f7f8ce5084cc7a1df87
Source dataset
uspto-grants-2010_04
Patent number
US07691850B2

Reaction notes

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