2-Oxopropanethioamide → 5'-Bromo-4-methoxy-5''-methyldispiro[cyclohexane-1,2'-[1]-benzofuran-3',2''-imidazole]-4''(3''H)-thione

HRID 539350

Reaction equation

HRID 539350 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:16][C:8]3([CH2:13][CH2:12][CH:11]([O:14][CH3:15])[CH2:10][CH2:9]3)[C:7](=[NH:17])[C:6]=2[CH:18]=1.O=[C:20]([CH3:24])[C:21](=[S:23])[NH2:22]>CO>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:16][C:8]3([CH2:9][CH2:10][CH:11]([O:14][CH3:15])[CH2:12][CH2:13]3)[C:7]3([NH:22][C:21](=[S:23])[C:20]([CH3:24])=[N:17]3)[C:6]=2[CH:18]=1

Participants

4

Reactant 2

HCID 207652372-Oxopropanethioamide3×HCID 679795445-Bromo-4'-methoxy-3H-spiro[benzofuran-2,1'-cyclohexan]-3-imine

Product 1

HCID 866672755'-Bromo-4-methoxy-5''-methyldispiro[cyclohexane-1,2'-[1]-benzofuran-3',2''-imidazole]-4''(3''H)-thioneYield 21.4%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
60 °C

Procedure

5-Bromo-4′-methoxy-3H-spiro[benzofuran-2,1′-cyclohexan]-3-imine (Example 29 Step 2, 1.37 g, 4.41 mmol) and 2-oxopropanethioamide (Intermediate 2, 0.909 g, 8.81 mmol) were dissolved in dry MeOH (25 mL) and the resulting orange solution was heated at 60° C. under a nitrogen atmosphere overnight. More 2-oxopropanethioamide (400 mg) was added and stirring continued. After 24 h the mixture was allowed to cool to r.t. and the solvent was evaporated. Purification by flash chromatography using a gradient of 0-100% EtOAc in heptane afforded 373 mg of the title compound (21% yield). 1 H NMR (500 MHz, DMSO-d6) δ ppm 1.35 (m, 1 H), 1.47 (m, 3 H), 1.87 (m, 2 H), 1.97 (m, 2 H), 2.29 (s, 3 H), 3.13 (s, 3 H), 4.11 (m, 1 H), 6.99 (d, 1 H), 7.16 (d, 1 H), 7.48 (dd, 1 H); MS (ES+) m/z 396 [M+H]+.

Workup

  1. temperatureto cool to r.t.
  2. customthe solvent was evaporated
  3. customPurification by flash chromatography

Sources & evidence

ORD record
ord-a57a1bce1cdb4616a91e9babc9159dca
Source dataset
uspto-grants-2014_10
Patent number
US08865911B2

Linked notes

Loading…