Diisopropylethylamine → (R)-tert-butyl 3-(1-(2-(dimethylamino)ethyl)-2-neopentyl-1H-benzo[d]imidazol-5-ylthio)pyrrolidine-1-carboxylate

HRID 241672Notes

Reaction equation

Br[C:2]1[CH:20]=[CH:19][C:5]2[N:6]([CH2:14][CH2:15][N:16]([CH3:18])[CH3:17])[C:7]([CH2:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[N:8][C:4]=2[CH:3]=1.[SH:21][C@@H:22]1[CH2:26][CH2:25][N:24]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:23]1.C(N(CC)C(C)C)(C)C>O1CCOCC1.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)C2C3OC4C(=CC=CC=4P(C4C=CC=CC=4)C4C=CC=CC=4)C(C)(C)C=3C=CC=2)C=CC=CC=1>[CH3:17][N:16]([CH3:18])[CH2:15][CH2:14][N:6]1[C:5]2[CH:19]=[CH:20][C:2]([S:21][C@@H:22]3[CH2:26][CH2:25][N:24]([C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])[CH2:23]3)=[CH:3][C:4]=2[N:8]=[C:7]1[CH2:9][C:10]([CH3:13])([CH3:12])[CH3:11]

Participants

Conditions

Temperature: 160 °C

Procedure

A mixture of 2-(5-bromo-2-neopentyl-1H-benzo[d]imidazol-1-yl)-N,N-dimethylethanamine (prepared in STEP A of Example 1, 937 mg, 2.77 mmol), (R)-tert-butyl 3-mercaptopyrrolidine-1-carboxylate (prepared in STEP C of Example 18, c.a. 3.60 mmol), 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (80.1 mg, 0.138 mmol), tris(dibenzylideneacetone)dipalladium(0) (63.1 mg, 0.0690 mmol) and N,N-diisopropylethylamine (725 microL, 4.15 mmol) in 1,4-dioxane (15 mL) was stirred at 160° C. for 1 h under microwave. The mixture was concentrated in vacuo and the residue was purified by amine gel column chromatography (hexane-ethyl acetate, gradient) to give the title compound (802 mg, 63% mmol) as a pale orange gum.

Workup

concentrationThe mixture was concentrated in vacuo
customthe residue was purified by amine gel column chromatography (hexane-ethyl acetate, gradient)

Sources & evidence

ORD record: ord-7a720e63a3f046b09e3788e1a3f18c56
Source dataset: uspto-grants-2014_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08653063B2

Reaction notes

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