Hydrochloric Acid → 6-chloro-2-((dimethylamino)methyl)-1-isopropyl-3-methyl-1H-indole-4-carboxylic acid hydrochloride salt

HRID 62351Notes

Reaction equation

HRID 62351 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:19]([O:21]C)=[O:20])[C:5]2[C:6]([CH3:18])=[C:7]([CH2:14][N:15]([CH3:17])[CH3:16])[N:8]([CH:11]([CH3:13])[CH3:12])[C:9]=2[CH:10]=1.Cl>>[ClH:1].[Cl:1][C:2]1[CH:3]=[C:4]([C:19]([OH:21])=[O:20])[C:5]2[C:6]([CH3:18])=[C:7]([CH2:14][N:15]([CH3:16])[CH3:17])[N:8]([CH:11]([CH3:13])[CH3:12])[C:9]=2[CH:10]=1

Participants

3

Reactant 2

HCID 313Hydrochloric AcidHCID 67468936methyl 6-chloro-2-((dimethylamino)methyl)-1-isopropyl-3-methyl-1H-indole-4-carboxylate

Product 1

HCID 674684516-chloro-2-((dimethylamino)methyl)-1-isopropyl-3-methyl-1H-indole-4-carboxylic acid hydrochloride saltYield 178.4%

Conditions

Temperature
80 °C

Procedure

To methyl 6-chloro-2-((dimethylamino)methyl)-1-isopropyl-3-methyl-1H-indole-4-carboxylate (0.44 g, 1.363 mmol) was added 6 N HCl (20 ml, 120 mmol). The reaction was purged with N2, attached a reflux condenser, heated to 80° C., and stirred for 18 hr. LCMS showed that the reaction was complete. The reaction was cooled to RT, diluted with an equal volume of water, washed with EtOAc, and evaporated to dryness under vacuum to give the product 6-chloro-2-((dimethylamino)methyl)-1-isopropyl-3-methyl-1H-indole-4-carboxylic acid hydrochloride salt (0.42 g, 1.216 mmol, 89% yield) as a beige solid. (86% pure by LCMS, contains ˜10% of the des-chloro side product from the previous reaction.) Used as is in the next step. 1H NMR (400 MHz, DMSO-d6) δ=13.19 (br. s., 1H), 10.45 (br. s., 1H), 7.90 (d, J=1.8 Hz, 1H), 7.33 (d, J=1.8 Hz, 1H), 4.91 (quin, J=6.9 Hz, 1H), 4.58 (d, J=5.6 Hz, 2H), 2.79 (d, J=4.8 Hz, 6H), 2.34 (s, 3H), 1.58 (d, J=6.8 Hz, 6H). MS(ES)+ m/e 309.2 [M+H]+, 264.1 [M+H]+ −45 (HNMe2).

Workup

  1. customThe reaction was purged with N2
  2. temperatureThe reaction was cooled to RT
  3. additiondiluted with an equal volume of water
  4. washwashed with EtOAc
  5. customevaporated to dryness under vacuum

Sources & evidence

ORD record
ord-324694e7d75542cf935f3909b4302a5d
Source dataset
uspto-grants-2016_09
Patent number
US09446041B2

Reaction notes

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