Triphenylphosphine → HCID 86708640, compound

HRID 921759Notes

Reaction equation

[N+:1]([C:4]1[CH:5]=[C:6]2[C:10](=[CH:11][CH:12]=1)[NH:9][CH:8]=[C:7]2[C:13]#[N:14])([O-:3])=[O:2].O[CH:16]1[CH2:21][CH2:20][N:19]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[CH2:18][CH2:17]1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CCOC(/N=N/C(OCC)=O)=O>C1COCC1>[C:13]([C:7]1[C:6]2[C:10](=[CH:11][CH:12]=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=2)[N:9]([CH:16]2[CH2:21][CH2:20][N:19]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[CH2:18][CH2:17]2)[CH:8]=1)#[N:14]

Participants

Conditions

Temperature: 25 °C

Procedure

To a solution of 5-nitro-1H-indole-3-carbonitrile (2.0 g, 10.69 mmol), tert-butyl 4-hydroxypiperidine-1-carboxylate (4.30 g, 21.37 mmol) and triphenylphosphine (5.61 g, 21.37 mmol) in 90 ml THF was slowly added DEAD (3.38 mL, 21.37 mmol) in 50 ml of THF over 3 hrs. The mixture was stirred 32 hrs at 25° C. The mixture was concentrated and purified on silica: 100% DCM 500 ml, then (5-60% EtOAc in Hexanes) to give tert-butyl 4-(3-cyano-5-nitro-1H-indol-1-yl)piperidine-1-carboxylate (1.3 g).

Workup

customover 3 hrs
concentrationThe mixture was concentrated
custompurified on silica

Sources & evidence

ORD record: ord-d3d17adf1bc54091be534e5cfc6f098d
Source dataset: uspto-grants-2016_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09273057B2

Reaction notes

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