2-Aminopyridine → HCID 90410768, compound
Reaction equation
C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1.Cl[C:48]1[CH:53]=[CH:52][N:51]=[CH:50][C:49]=1[N+:54]([O-:56])=[O:55].[NH2:57][C:58]1[CH:63]=[CH:62][CH:61]=[CH:60][N:59]=1.C([O-])([O-])=O.[K+].[K+]>C1(C)C=CC=CC=1.CC([O-])=O.CC([O-])=O.[Pd+2]>[N+:54]([C:49]1[CH:50]=[N:51][CH:52]=[CH:53][C:48]=1[NH:57][C:58]1[CH:63]=[CH:62][CH:61]=[CH:60][N:59]=1)([O-:56])=[O:55]Participants
Procedure
Pd(OAc)2 (9.5 mg, 0.042 mmol) and BINAP (26 mg, 0.042 mmol) were combined in toluene (1 ml) and stirred at rt for 10 minutes. This mixture was then added to a sealed vessel which contained 4-chloro-3-nitropyridine (172 mg 1.0 mmol), 2-aminopyridine (100 mg, 1.0 mmol), and K2CO3 (160 mg, 1.2 mmol) in toluene (2 ml). The reaction was heated to 110° C. for 2 h. The reaction was filtered while hot and the filter cake washed with EtOAc. The combined filtrates were concentrated and purified on 16 g SiO2 with 0-40% EtOAc hexanes. MS (ESI): mass calcd. for C10H8N4O2, 216.0. m/z found, 217.1 [M+H]+. 1H NMR (400 MHz, CDCl3) δ 10.39 (s, 1H), 9.35 (s, 1H), 8.81 (d, J=6.2 Hz, 1H), 8.50 (d, J=6.1 Hz, 1H), 8.44 (dd, J=5.0, 1.2 Hz, 1H), 7.74 (ddd, J=8.2, 7.4, 1.9 Hz, 1H), 7.09 (ddd, J=7.4, 5.0, 0.9 Hz, 1H), 7.02 (t, J=7.8 Hz, 1H).
Workup
- additionThis mixture was then added to a sealed vessel which
- temperatureThe reaction was heated to 110° C. for 2 h
- filtrationThe reaction was filtered while hot and the filter cake
- washwashed with EtOAc
- concentrationThe combined filtrates were concentrated
- custompurified on 16 g SiO2 with 0-40% EtOAc hexanes
Sources & evidence
- ORD record
- ord-0a061ee2b89249268354819dc6e23314
- Source dataset
- uspto-grants-2015_06
- Patent number
- US09066946B2
Reaction notes
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