Sodium triacetoxyborohydride → (2s)-2-({4-[(2,3-Dihydro[1,4]oxathiino[2,3-c]pyridin-7-ylmethyl)amino]-1-piperidinyl}methyl)-1,2-dihydro-3h,8h-2a,5,8a-triazaacenaphthylene-3,8-dione

HRID 1943199Notes

Reaction equation

HRID 1943199 reaction equation
[NH2:1][CH:2]1[CH2:7][CH2:6][N:5]([CH2:8][CH:9]2[N:19]3[C:20]4[N:11]([C:12](=[O:22])[CH:13]=[CH:14][C:15]=4[N:16]=[CH:17][C:18]3=[O:21])[CH2:10]2)[CH2:4][CH2:3]1.[S:23]1[C:32]2[CH:31]=[C:30]([CH:33]=O)[N:29]=[CH:28][C:27]=2[O:26][CH2:25][CH2:24]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(Cl)(Cl)Cl.CO>[S:23]1[C:32]2[CH:31]=[C:30]([CH2:33][NH:1][CH:2]3[CH2:7][CH2:6][N:5]([CH2:8][C@@H:9]4[N:19]5[C:20]6[N:11]([C:12](=[O:22])[CH:13]=[CH:14][C:15]=6[N:16]=[CH:17][C:18]5=[O:21])[CH2:10]4)[CH2:4][CH2:3]3)[N:29]=[CH:28][C:27]=2[O:26][CH2:25][CH2:24]1

Participants

5

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 574231152,3-Dihydro[1,4]oxathiino[2,3-c]pyridine-7-carbaldehydeHCID 580017682-((4-aminopiperidin-1-yl)methyl)-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione

Product 1

HCID 25101273(2s)-2-({4-[(2,3-Dihydro[1,4]oxathiino[2,3-c]pyridin-7-ylmethyl)amino]-1-piperidinyl}methyl)-1,2-dihydro-3h,8h-2a,5,8a-triazaacenaphthylene-3,8-dioneYield 42%

Reagents, catalysts & solvents 1

HCID 21584188Chloroform methanolSolvent

Procedure

Racemic 2-[(4-amino-1-piperidinyl)methyl]-1,2-dihydro-3H,8H-2a,5,8a-triazaacenaphthylene-3,8-dione (for a preparation see Example 16A(j)) (360 mg, 1.195 mmol) was stirred with 2,3-dihydro[1,4]oxathiino[2,3-c]pyridine-7-carbaldehyde (for a synthesis see WO2004058144, Example 60) (195 mg, 0.9 eq.) in chloroform:methanol (9:1, v:v, 15 ml) at room temperature for 30 mins; the mixture was then treated with sodium triacetoxyborohydride (760 mg, 3.0 eq.) with vigorous stirring at room temperature for 30 mins. The reaction was quenched by addition of saturated aqueous sodium hydrogen carbonate (5 ml) and the mixture was stirred at room temperature for 5 mins. The organic phase was separated, dried over anhydrous Na2SO4 and evaporated under reduced pressure. The crude product was purified by column chromatography on silica (eluting with 0-12% (2M ammonia in methanol) in DCM, appropriate fractions were combined and evaporated under reduced pressure to give the free base of the title compound as a pale yellow foam (235 mg, 42%).

Workup

  1. customat room temperature
  2. customfor 30 mins
  3. customThe reaction was quenched by addition of saturated aqueous sodium hydrogen carbonate (5 ml)
  4. stirringthe mixture was stirred at room temperature for 5 mins
  5. customThe organic phase was separated
  6. dry with materialdried over anhydrous Na2SO4
  7. customevaporated under reduced pressure
  8. customThe crude product was purified by column chromatography on silica (
  9. washeluting with 0-12% (2M ammonia in methanol) in DCM
  10. customevaporated under reduced pressure

Sources & evidence

ORD record
ord-b7686cf078004badb05b8134c39a2f66
Source dataset
uspto-grants-2013_03
Patent number
US08389524B2

Reaction notes

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