Hydrochloric Acid → (Z)-6-hydroxy-2-[(5-methyl-1H-indol-3-yl)methylene]-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one dihydrochloride

HRID 1749734Notes

Reaction equation

HRID 1749734 reaction equation
[OH:1][C:2]1[CH:22]=[CH:21][C:5]2[C:6](=[O:20])/[C:7](=[CH:9]/[C:10]3[C:18]4[C:13](=[CH:14][CH:15]=[C:16]([CH3:19])[CH:17]=4)[NH:12][CH:11]=3)/[O:8][C:4]=2[C:3]=1[CH2:23][N:24]1[CH2:29][CH2:28][N:27](C(OC(C)(C)C)=O)[CH2:26][CH2:25]1.[ClH:37]>C(Cl)Cl.O1CCOCC1>[ClH:37].[ClH:37].[OH:1][C:2]1[CH:22]=[CH:21][C:5]2[C:6](=[O:20])/[C:7](=[CH:9]/[C:10]3[C:18]4[C:13](=[CH:14][CH:15]=[C:16]([CH3:19])[CH:17]=4)[NH:12][CH:11]=3)/[O:8][C:4]=2[C:3]=1[CH2:23][N:24]1[CH2:29][CH2:28][NH:27][CH2:26][CH2:25]1

Participants

5

Reactant 2

HCID 313Hydrochloric AcidHCID 86681929tert-butyl (Z)-4-({6-hydroxy-2-[(5-methyl-1H-indol-3-yl)methylene]-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate

Product 1

HCID 86681930(Z)-6-hydroxy-2-[(5-methyl-1H-indol-3-yl)methylene]-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one dihydrochlorideYield 64%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 312751,4-DioxaneSolvent

Procedure

A solution of tert-butyl (Z)-4-({6-hydroxy-2-[(5-methyl-1H-indol-3-yl)methylene]-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.030 g, 0.061 mmol) in methylene chloride (2.0 mL) was added with a 4 M solution of hydrogen chloride in 1,4-dioxane (2.0 mL), and then the mixture was stirred at room temperature for 2 hours. The mixture was azeotroped twice with toluene under reduced pressure, and then the residual solid was suspended in a mixed solvent of methylene chloride and diethyl ether and thereby washed to obtain (Z)-6-hydroxy-2-[(5-methyl-1H-indol-3-yl)methylene]-7-(piperazin-1-ylmethyl)benzofuran-3(2H)-one dihydrochloride (0.018 g, 64%).

Workup

  1. customThe mixture was azeotroped twice with toluene under reduced pressure
  2. washwashed

Sources & evidence

ORD record
ord-ea0a700c86f8463d8e694b4f71551bd3
Source dataset
uspto-grants-2015_10
Patent number
US09156827B2

Reaction notes

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