Water → rac-Ethyl 7-(8-ethyl-2,3-diphenyl-7,8-dihydropyrido[2,3-b]pyrazin-5(6H)-yl)heptanoate

HRID 2276541Notes

Reaction equation

HRID 2276541 reaction equation
[CH2:1]([CH:3]1[C:12]2[C:7](=[N:8][C:9]([C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)=[C:10]([C:13]3[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=3)[N:11]=2)[NH:6][CH2:5][CH2:4]1)[CH3:2].O=[CH:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][C:32]([O:34][CH2:35][CH3:36])=[O:33].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].O>ClCCCl>[CH2:1]([CH:3]1[C:12]2[C:7](=[N:8][C:9]([C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)=[C:10]([C:13]3[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=3)[N:11]=2)[N:6]([CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][C:32]([O:34][CH2:35][CH3:36])=[O:33])[CH2:5][CH2:4]1)[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 77609Heptanoic acid, 7-oxo-, ethyl esterHCID 5049666Sodium triacetoxyborohydrideHCID 66666341Rac-8-ethyl-2,3-diphenyl-5,6,7,8-tetrahydropyrido[2,3-b]pyrazine

Product 1

HCID 123432560rac-Ethyl 7-(8-ethyl-2,3-diphenyl-7,8-dihydropyrido[2,3-b]pyrazin-5(6H)-yl)heptanoate

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

To a solution of rac-8-ethyl-2,3-diphenyl-5,6,7,8-tetrahydropyrido[2,3-b]pyrazine (Intermediate HC)(13 mg, 0.041 mmol) in DCE (2 ml) was added ethyl 7-oxoheptanoate (24.84 mg, 0.144 mmol) followed by sodium triacetoxyborohydride (69.9 mg, 0.330 mmol). The reaction mixture was left to stir at room temperature under an atmosphere of nitrogen. Water (10 ml) was added and the resulting mixture was extracted with EtOAc (3×10 ml). The combined organic extracts were dried over MgSO4, filtered and concentrated in vacuo. The crude product was passed through a pre-conditioned Isolute SCX-2 SPE column loading with MeOH and eluting with 1M ammonia in MeOH (10 ml) to afford the title product;

Workup

  1. waitThe reaction mixture was left
  2. extractionthe resulting mixture was extracted with EtOAc (3×10 ml)
  3. dry with materialThe combined organic extracts were dried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. washeluting with 1M ammonia in MeOH (10 ml)

Sources & evidence

ORD record
ord-af07acfe51bb4390969effe10a02df4d
Source dataset
uspto-grants-2015_09
Patent number
US09132127B2

Reaction notes

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