Hydrochloric Acid → 2-(3,5-Di-tert-butyl-4-hydroxyphenyl)-3-[3-[N-methyl-N-[2-(3,4-methylenedioxyphenoxy)ethyl]-amino]propyl]-5-(2-hydroxyethyl)-1,3-thiazolidin-4-one

HRID 609888Notes

Reaction equation

HRID 609888 reaction equation
[C:1]([C:5]1[CH:6]=[C:7]([CH:16]2[N:20]([CH2:21][CH2:22][CH2:23][N:24]([CH3:37])[CH2:25][CH2:26][O:27][C:28]3[CH:33]=[CH:32][C:31]4[O:34][CH2:35][O:36][C:30]=4[CH:29]=3)[C:19](=[O:38])[CH:18]([CH2:39][C:40](OCC)=[O:41])[S:17]2)[CH:8]=[C:9]([C:12]([CH3:15])([CH3:14])[CH3:13])[C:10]=1[OH:11])([CH3:4])([CH3:3])[CH3:2].[H-].[Al+3].[Li+].[H-].[H-].[H-].O.Cl>O1CCCC1>[C:12]([C:9]1[CH:8]=[C:7]([CH:16]2[N:20]([CH2:21][CH2:22][CH2:23][N:24]([CH3:37])[CH2:25][CH2:26][O:27][C:28]3[CH:33]=[CH:32][C:31]4[O:34][CH2:35][O:36][C:30]=4[CH:29]=3)[C:19](=[O:38])[CH:18]([CH2:39][CH2:40][OH:41])[S:17]2)[CH:6]=[C:5]([C:1]([CH3:3])([CH3:2])[CH3:4])[C:10]=1[OH:11])([CH3:13])([CH3:14])[CH3:15]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 21226445Aluminium lithium hydrideHCID 544079592-(3, 5-Di-tert-butyl-4-hydroxyphenyl)-3-[3-[N-methyl-N-[2-(3,4-methylenedioxyphenoxy)ethyl]amino]-propyl]-5-ethoxycarbonylmethyl-1,3-thiazolidin-4-one

Product 1

HCID 537350502-(3,5-Di-tert-butyl-4-hydroxyphenyl)-3-[3-[N-methyl-N-[2-(3,4-methylenedioxyphenoxy)ethyl]-amino]propyl]-5-(2-hydroxyethyl)-1,3-thiazolidin-4-oneYield 91.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Conditions

Temperature
0 °C

Procedure

To a solution of 2-(3,5-di-tert-butyl-4-hydroxyphenyl)-3-[3-[N-methyl-N-[2-(3,4-methylenedioxy-phenoxy)ethyl]amino]propyl]-5-ethoxycarbonylmethyl-1,3-thiazolidin-4-one (80 mg) prepared in Example 46 in dry tetrahydrofuran (5 ml) was added lithium aluminum hydride (20 mg) at -78° C., and the mixture was stirred at 0° C. for 3 hours. To the mixture was added water-containing tetrahydrofuran (5 ml), followed by stirring at that temperature for 1 hour. The mixture was neutralized with 1N hydrochloric acid, concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent; chloroform-methanol, 95:5) to afford 68 mg (86%) of the title compound as a colorless oil. NMR (CDCl3) (200 MHz) δ: 1.41 (18H, s), 1.3-1.8 (4H, m), 2.19 (3H, s), 2.2-2.5 (3H, m), 2.67 (2H, t, J=5.7 Hz), 2.7-2.9 (1H, m), 3.4-3.6 (1H, m), 3.8-4.0 (2H, m), 3.91 (2H, t, J=5.7 Hz), 4.04 (1H, t, J=5.7 Hz), 5.33 (1H, s), 5.60 (1H, s), 5.90 (2H, s), 6.2-6.7 (3H, m), 7.12 (2H, s)

Workup

  1. stirringby stirring at that temperature for 1 hour
  2. concentrationconcentrated under reduced pressure
  3. customThe residue was purified by silica gel column chromatography (eluent; chloroform-methanol, 95:5)

Sources & evidence

ORD record
ord-2cd9a154b1bb4d6083aea53d1de4522e
Source dataset
uspto-grants-1999_12
Patent number
US05998452

Reaction notes

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