Potassium Carbonate → tert-Butyl 3-({2-[(2-tert-butyl-1,1-dioxido-3-oxo-5-phenyl-2,3-dihydroisothiazol-4-yl)amino]ethyl}thio)pyrrolidine-1-carboxylate

HRID 2239700Notes

Reaction equation

HRID 2239700 reaction equation
CC1C=CC(S(O[CH2:12][CH2:13][NH:14][C:15]2[C:16](=[O:32])[N:17]([C:28]([CH3:31])([CH3:30])[CH3:29])[S:18](=[O:27])(=[O:26])[C:19]=2[C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)(=O)=O)=CC=1.[SH:33][CH:34]1[CH2:38][CH2:37][N:36]([C:39]([O:41][C:42]([CH3:45])([CH3:44])[CH3:43])=[O:40])[CH2:35]1.C(=O)([O-])[O-].[K+].[K+]>CC#N>[C:28]([N:17]1[C:16](=[O:32])[C:15]([NH:14][CH2:13][CH2:12][S:33][CH:34]2[CH2:38][CH2:37][N:36]([C:39]([O:41][C:42]([CH3:45])([CH3:44])[CH3:43])=[O:40])[CH2:35]2)=[C:19]([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[S:18]1(=[O:26])=[O:27])([CH3:31])([CH3:30])[CH3:29]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 13324658tert-Butyl 3-sulfanylpyrrolidine-1-carboxylateHCID 866258662-[(2-tert-Butyl-1,1-dioxido-3-oxo-5-phenyl-2,3-dihydroisothiazol-4-yl)amino]ethyl 4-methylbenzenesulfonate

Product 1

HCID 11691969tert-Butyl 3-({2-[(2-tert-butyl-1,1-dioxido-3-oxo-5-phenyl-2,3-dihydroisothiazol-4-yl)amino]ethyl}thio)pyrrolidine-1-carboxylateYield 84%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
120 °C

Procedure

2-[(2-tert-Butyl-1,1-dioxido-3-oxo-5-phenyl-2,3-dihydroisothiazol-4-yl)amino]ethyl 4-methylbenzenesulfonate (150 mg, 0.313 mmol) was dissolved in dry MeCN (3 mL) under nitrogen atmosphere. tert-Butyl 3-mercaptopyrrolidine-1-carboxylate (70 mg, 0.345 mmol) was added followed by potassium carbonate (217 mg, 1.567 mmol). The reaction mixture was heated in a microwave reactor at 120° C. for 15 mins. Potassium carbonate was filtered off and the reaction mixture was evaporated to dryness in a vacuum centrifuge. The crude product was purified by preparative HPLC affording the title compound (134 mg, 83.4%). The product is a mixture of cis and trans isomers. 1H NMR (CDCl3, 500 MHz): δ 1.47 (s, 9H), 1.73 (s, 10H), 2.05 (s, 1H), 2.46-2.51 (m, 2H), 2.88 (bs, 1H), 3.01-3.13 (m, 3H), 3.29 (s, 1H), 3.41-3.57 (m, 2H), 5.65 (bs, 1H), 7.43-7.46 (m, 3H), 7.49-7.53 (m, 2H); 13C NMR (CDCl3, 125 MHz): δ 27.83, 28.73, 31.29, 32.33, 32.86, 41.74, 42.41, 43.23, 44.86, 45.09, 52.27, 52.53, 61.86, 79.79, 108.04, 125.15, 129.04, 130.04, 131.65, 134.81, 154.41, 159.66; Mass Spectrum: M+H+ 509.9.

Workup

  1. filtrationPotassium carbonate was filtered off
  2. customthe reaction mixture was evaporated to dryness in a vacuum centrifuge
  3. customThe crude product was purified by preparative HPLC

Sources & evidence

ORD record
ord-4bdbb0c2c8944e118c70c36999aac7e6
Source dataset
uspto-grants-2010_05
Patent number
US07723333B2

Reaction notes

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