Diethyl Ether → tert-butyl (3aS,6aS)-5-(5-bromo-3-pyridinyl)hexahydropyrrolo[3,4-b]pyrrole-1(2H)-carboxylate

HRID 1642166Notes

Reaction equation

[N:1]1([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:5][CH2:4][C@H:3]2[CH2:6][NH:7][CH2:8][C@@H:2]12.[Br:16][C:17]1[CH:18]=[N:19][CH:20]=[C:21](Br)[CH:22]=1.CC(C)([O-])C.[Na+].C(OCC)C>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C1(P(C2C=CC=CC=2)C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[Br:16][C:17]1[CH:22]=[C:21]([N:7]2[CH2:6][C@H:3]3[C@H:2]([N:1]([C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])[CH2:5][CH2:4]3)[CH2:8]2)[CH:20]=[N:19][CH:18]=1

Participants

Conditions

Temperature: 80 °C

Procedure

The product from Example 15E (0.56 g, 2.70 mmol) in toluene (27 mL) was treated with tris(dibenzylideneacetone)dipalladium(0) (Pd2(dba)3, available from Alfa Aesar) (50 mg, 0.10 mmol), 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (BINAP, available from Strem Chemicals) (68 mg, 0.10 mmol), 3,5-dibromopyridine (available from Aldrich Chemical Co.,) (0.69 g, 2.90 mmol) and sodium tert-butoxide (available from Aldrich Chemical Co.,) (0.44 g, 4.60 mmol). After heating at 80° C. for 16 hours, the reaction mixture was poured into diethyl ether (100 mL), washed with brine (100 mL), dried (MgSO4) and concentrated under reduced pressure. The residue was purified by chromatography (SiO2, 5% MeOH/CH2Cl2) to provide the title compound as a yellow oil (0.47 g, 47% yield). MS (DCI/NH3) m/z 368/370 (M+H)+.

Workup

washwashed with brine (100 mL)
dry with materialdried (MgSO4)
concentrationconcentrated under reduced pressure
customThe residue was purified by chromatography (SiO2, 5% MeOH/CH2Cl2)

Sources & evidence

ORD record: ord-5ee7462d8c6b448bbf5c2a2192649107
Source dataset: uspto-grants-2012_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08119635B2

Reaction notes

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