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

HRID 639092Notes

Reaction equation

HRID 639092 reaction equation
[NH2:1][CH2:2][C@H:3]1[CH2:7][N:6]([CH2:8][CH2:9][C:10]2[C:19]3[C:14](=[CH:15][CH:16]=[C:17]([O:20][CH3:21])[N:18]=3)[N:13]=[CH:12][C:11]=2[F:22])[CH2:5][C@H:4]1[OH:23].[O:24]=[C:25]1[NH:30][C:29]2[N:31]=[C:32]([CH:35]=O)[CH:33]=[CH:34][C:28]=2[S:27][CH2:26]1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+]>C(Cl)Cl.CCO>[F:22][C:11]1[CH:12]=[N:13][C:14]2[C:19]([C:10]=1[CH2:9][CH2:8][N:6]1[CH2:5][C@H:4]([OH:23])[C@H:3]([CH2:2][NH:1][CH2:35][C:32]3[CH:33]=[CH:34][C:28]4[S:27][CH2:26][C:25](=[O:24])[NH:30][C:29]=4[N:31]=3)[CH2:7]1)=[N:18][C:17]([O:20][CH3:21])=[CH:16][CH:15]=2

Participants

6

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 115935913-Oxo-3,4-dihydro-2H-pyrido[3,2-b][1,4]thiazine-6-carbaldehydeHCID 59026096(3S,4S)-4-(aminomethyl)-1-{2-[3-fluoro-6-(methyloxy)-1,5-naphthyridin-4-yl]ethyl}-3-pyrrolidinol

Product 1

HCID 59026136(+/-)-6-({[(Cis-1-{2-[3-fluoro-6-(methyloxy)-1,5-naphthyridin-4-yl]ethyl}-4-hydroxy-3-pyrrolidinyl)methyl]amino}methyl)-2H-pyrido[3,2-b][1,4]thiazin-3(4H)-oneYield 66.9%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of (±)-cis-4-(aminomethyl)-1-{2-[3-fluoro-6-(methyloxy)-1,5-naphthyridin-4-yl]ethyl}-3-pyrrolidinol (0.23 g, 0.72 mmole) in dry CH2Cl2 (25 mL) and dry EtOH (10 mL) at RT was added 3-oxo-3,4-dihydro-2H-pyrido[1,4]thiazine-6-carboxaldehyde (0.14 g, 0.72 mmole). After 24 h, at RT was added NaBH(OAc)3 (0.23 g, 1.08 mmole). After 2 h, the reaction solution was concentrated under vacuum and purified on silica (CHCl3/MeOH, 9:1 containing 5% NH4OH) to afford the title compound (0.24 g, 66%) as light yellow solid: 1H NMR (400 MHz, CD3OD) δ 8.65 (s, 1H), 8.19 (d, J=9.0 Hz, 1H), 7.77 (d, J=7.8 Hz, 1H), 7.17 (d, J=9.0 Hz, 1H), 7.11 (d, J=8.0 Hz, 1H), 4.21 (s, 2H), 4.12 (s, 3H), 3.52 (m, 4H), 3.33 (s, 4H), 3.21 (m, 2H), 3.09 (m, 2H), 2.98 (m, 2H). LC-MS (ES) m/e 499 (M+H)+.

Workup

  1. waitAfter 2 h
  2. concentrationthe reaction solution was concentrated under vacuum
  3. custompurified on silica (CHCl3/MeOH, 9:1 containing 5% NH4OH)

Sources & evidence

ORD record
ord-c26153260a014f60a79dd7ff15d3f8c0
Source dataset
uspto-grants-2010_04
Patent number
US07691850B2

Reaction notes

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