Orthosilicic acid → 1-(3-Tert-butyldiphenylsilyloxymethyl-2,4-dichlorophenyl)-4-chloro-2-cyanopyrrole

HRID 613622Notes

Reaction equation

HRID 613622 reaction equation
[Si:1]([O:18][CH2:19][C:20]1[C:21]([Cl:34])=[C:22]([N:27]2[CH:31]=[CH:30][CH:29]=[C:28]2[C:32]#[N:33])[CH:23]=[CH:24][C:25]=1[Cl:26])([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Si](O)(O)(O)O.[Cl:40]OC(C)(C)C>C(Cl)(Cl)(Cl)Cl.O>[Si:1]([O:18][CH2:19][C:20]1[C:21]([Cl:34])=[C:22]([N:27]2[CH:31]=[C:30]([Cl:40])[CH:29]=[C:28]2[C:32]#[N:33])[CH:23]=[CH:24][C:25]=1[Cl:26])([C:14]([CH3:15])([CH3:16])[CH3:17])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 14942Orthosilicic acidHCID 521297Tert-Butyl hypochloriteHCID 183218191-(3-Tert-butyldiphenylsilyloxymethyl-2,4-dichlorophenyl)-2-cyanopyrrole

Product 1

HCID 183218251-(3-Tert-butyldiphenylsilyloxymethyl-2,4-dichlorophenyl)-4-chloro-2-cyanopyrroleYield 30.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 5943Carbon TetrachlorideSolvent2×

Procedure

To a mixture of 1-(3-tert-butyldiphenylsilyloxymethyl-2,4-dichlorophenyl)-2-cyanopyrrole (900 mg) and silicic acid (100 mg) in carbon tetrachloride (15 ml) was added a solution of tert-butyl hypochlorite (222 mg) in carbon tetrachloride (10 ml) in water bath, and the mixture was stirred for 30 minutes at the same temperature. The reaction mixture was filtered, and the filtrate was evaporated in vacuo. The residue was purified by silica gel column chromatography eluting with a mixture of n-hexane and ethyl acetate (15:1, V/V) to give 1-(3-tert-butyldiphenylsilyloxymethyl-2,4-dichlorophenyl)-4-chloro-2-cyanopyrrole (290 mg) as an oil.

Workup

  1. filtrationThe reaction mixture was filtered
  2. customthe filtrate was evaporated in vacuo
  3. customThe residue was purified by silica gel column chromatography
  4. washeluting with a mixture of n-hexane and ethyl acetate (15:1, V/V)

Sources & evidence

ORD record
ord-c8145de3eb504a5fb12cfc0650c36496
Source dataset
uspto-grants-1999_12
Patent number
US06008229

Reaction notes

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