Trifluoroacetic acid → (3SR,4RS)-1-Benzyl-3-(3,4-dichloro-phenyl)-4-nitro-pyrrolidine

HRID 587304Notes

Reaction equation

CO[CH2:3][N:4]([CH2:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)[CH2:5][Si](C)(C)C.[Cl:17][C:18]1[CH:23]=[CH:22][C:21](/[CH:24]=[CH:25]/[N+:26]([O-:28])=[O:27])=[CH:20][C:19]=1[Cl:29].FC(F)(F)C(O)=O>C(Cl)Cl>[CH2:10]([N:4]1[CH2:5][CH:25]([N+:26]([O-:28])=[O:27])[CH:24]([C:21]2[CH:22]=[CH:23][C:18]([Cl:17])=[C:19]([Cl:29])[CH:20]=2)[CH2:3]1)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of N-(methoxymethyl)-N-(phenylmethyl)-N-(trimethylsilyl)methylamine (32.50 g, 0.135 mol) in CH2Cl2 (70 mL) was added drop wise, over a 30 minutes period, to a stirred solution of 1,2-dichloro-4-((E)-2-nitro-vinyl)-benzene (19.60 g, 0.09 mol) and trifluoroacetic acid (1.54 mL, 0.013 mol) in CH2Cl2 (160 mL) at 0° C. The ice bath was removed, and the solution was stirred at 25° C. for an additional 48 h. It was then concentrated and purification by flash chromatography (SiO2, EtOAc/H 1:6) afforded 25.0 g (79%) of the title compound as a yellow oil. ES-MS m/e: 351.0 (M+H+).

Workup

customat 0° C
customThe ice bath was removed
concentrationIt was then concentrated
custompurification by flash chromatography (SiO2, EtOAc/H 1:6)

Sources & evidence

ORD record: ord-a4fe32a9d5344b2d8b59f9d15f3abfea
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09226916B2

Reaction notes

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