Triethylamine → (8R,9aR)-8-[(5-cyclopropylpyrazin-2-yl)oxy]-2-[4-(trifluoromethoxy)benzyl]octahydro-5H-pyrrolo[1,2-a][1,4]diazepin-5-one

HRID 1050314Notes

Reaction equation

HRID 1050314 reaction equation
Cl.[CH:2]1([C:5]2[N:6]=[CH:7][C:8]([O:11][C@H:12]3[CH2:22][N:15]4[C:16](=[O:21])[CH2:17][CH2:18][NH:19][CH2:20][C@H:14]4[CH2:13]3)=[N:9][CH:10]=2)[CH2:4][CH2:3]1.[F:23][C:24]([F:35])([F:34])[O:25][C:26]1[CH:33]=[CH:32][C:29]([CH:30]=O)=[CH:28][CH:27]=1.C(N(CC)CC)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCl>[CH:2]1([C:5]2[N:6]=[CH:7][C:8]([O:11][C@H:12]3[CH2:22][N:15]4[C:16](=[O:21])[CH2:17][CH2:18][N:19]([CH2:30][C:29]5[CH:32]=[CH:33][C:26]([O:25][C:24]([F:23])([F:34])[F:35])=[CH:27][CH:28]=5)[CH2:20][C@H:14]4[CH2:13]3)=[N:9][CH:10]=2)[CH2:4][CH2:3]1

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 69573p-(Trifluoromethoxy)benzaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 86723197(8R,9aR)-8-[(5-cyclopropylpyrazin-2-yl)oxy]octahydro-5H-pyrrolo[1,2-a][1,4]diazepin-5-one hydrochloride

Product 1

HCID 76287560(8R,9aR)-8-[(5-cyclopropylpyrazin-2-yl)oxy]-2-[4-(trifluoromethoxy)benzyl]octahydro-5H-pyrrolo[1,2-a][1,4]diazepin-5-oneYield 50%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

(8R,9aR)-8-[(5-Cyclopropylpyrazin-2-yl)oxy]octahydro-5H-pyrrolo[1,2-a][1,4]diazepin-5-one hydrochloride (60 mg, 0.185 mmol, prepared as described in Example 55, Part B) was suspended in dichloromethane (1.0 mL) in a 4-mL scintillation vial. 4-(Trifluoromethoxy)benzaldehyde (45.7 mg, 0.240 mmol, 1.3 equivalents) was added followed by triethylamine (0.051 mL, 0.369 mmol, 2.0 equiv). After stirring for 10 minutes, sodium triacetoxyborohydride (94 mg, 0.443 mmol, 2.4 equivalents) was added, and the reaction was stirred at room temperature for an additional four hours. The suspension was loaded directly onto a 4 g silica gel column and eluted with ethyl acetate (flow rate=18 mL/minute) over 20 minutes to give the title compound as a light yellow oil (42 mg, 50%). 1H NMR (400 MHz, CDCl3) δ ppm 8.03 (d, J=1.2 Hz, 1H), 7.93 (d, J=1.3 Hz, 1H), 7.35 (d, J=8.6 Hz, 2H), 7.17 (d, J=8.0 Hz, 2H), 5.44-5.24 (m, 1H), 4.10 (td, J=9.3, 4.5 Hz, 1H), 3.88 (dd, J=13.2, 5.2 Hz, 1H), 3.74 (dd, J=13.2, 2.0 Hz, 1H), 3.59 (s, 2H), 2.91 (dd, J=12.6, 6.8 Hz, 1H), 2.86-2.71 (m, 2H), 2.71-2.50 (m, 2H), 2.50-2.31 (m, 2H), 2.08-1.82 (m, 2H), 1.00-0.88 (m, 4H); MS (ESI+) m/z 463.1 (M+H)+; [a]D23.6=0.08 (c=0.17, CH3OH).

Workup

  1. stirringthe reaction was stirred at room temperature for an additional four hours
  2. washeluted with ethyl acetate (flow rate=18 mL/minute) over 20 minutes

Sources & evidence

ORD record
ord-3a03b92c4ae3417b9fdfe106c265815f
Source dataset
uspto-grants-2016_07
Patent number
US09382258B2

Reaction notes

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