N-Iodosuccinimide → HCID 54219555, compound

HRID 1734649Notes

Reaction equation

HRID 1734649 reaction equation
[C:1]([O:4][CH:5]1[CH:9]([N:10]2[C:14]3[CH:15]=[C:16]([Cl:20])[C:17]([Cl:19])=[CH:18][C:13]=3[N:12]=[CH:11]2)[CH2:8][CH:7]([CH2:21][O:22][C:23](=[O:25])[CH3:24])[CH:6]1[O:26][C:27](=[O:29])[CH3:28])(=[O:3])[CH3:2].[I:30]N1C(=O)CCC1=O>CN(C)C=O>[C:1]([O:4][CH:5]1[CH:9]([N:10]2[C:14]3[CH:15]=[C:16]([Cl:20])[C:17]([Cl:19])=[CH:18][C:13]=3[N:12]=[C:11]2[I:30])[CH2:8][CH:7]([CH2:21][O:22][C:23](=[O:25])[CH3:24])[CH:6]1[O:26][C:27](=[O:29])[CH3:28])(=[O:3])[CH3:2]

Participants

4

Reactant 2

HCID 120273N-IodosuccinimideHCID 54044812HCID 54044812, compound

Product 1

HCID 54219555HCID 54219555, compoundYield 40%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

(±)(1R*, 2S*, 3S*, 5S*)-3-(Acetoxymethyl)-5-(5,6-dichloro-1H-benzimidazol-1-yl)-1,2-cyclopentanediyl diacetate (500 mg, 1.13 mmol) was dissolved in dry N,N-dimethylformamide (4 mL) and heated to 95°-105° C. N-Iodosuccinimide (534 mg, 2.3 mmol as 95%) was added in portions over 5.5 hours. Volatiles were removed in vacuo and the residue chromatographed on silica gel. Elution with 10% ethyl acetate-hexanes followed by solidification from ethanol-water gave (±)(1R*, 2S* 3S*, 5S*)-3-(acetoxymethyl)-5-(5,6-dichloro-2-iodo-1H-benzimidazol-1-yl)-1,2-cyclopentanediyl diacetate as a white powder (255 mg, 40%), m.p.152.5°-153° C.; 1H-NMR(DMSO-d6)δ: 8.32 and 7.94 (both s, 2, 2 aromatic CH), 5.8-5.7 (m, 1, OCH), 5.4-5.3(m, 1, OCH), 5.2-5.0 (m, 1, NCH), 4.35-4.2 (m, 2, OCH2), 2.7-2.6 (m, 1, CH), 2.35-2.25 (m, 2, CH2), 2.11, 2.08, and 1.93 (all s, 3 each, 3 CH3); mass spectrum(CI) 569 (M +1).

Workup

  1. temperatureheated to 95°-105° C
  2. customVolatiles were removed in vacuo
  3. customthe residue chromatographed on silica gel
  4. washElution with 10% ethyl acetate-hexanes

Sources & evidence

ORD record
ord-2d14244fe2c54039b8a8868768237404
Source dataset
uspto-grants-1996_07
Patent number
US05534535

Reaction notes

Loading…