Pyridine → (S)-N-(5-(3-methylpyridin-2-ylthio)-3-(2-methylpyridin-3-yloxy)pyridin-2-yl)-3-(1,4-dioxaspiro[4.5]decan-2-yl)-1,2,4-thiadiazol-5-amine

HRID 534054Notes

Reaction equation

HRID 534054 reaction equation
[N-:1]=[C:2]=[S:3].[Na+].N1C=CC=CC=1.CS(O[N:16]=[C:17](Cl)[C@H:18]1[CH2:22][O:21][C:20]2([CH2:27][CH2:26][CH2:25][CH2:24][CH2:23]2)[O:19]1)(=O)=O.[CH3:29][C:30]1[C:31]([S:36][C:37]2[CH:38]=[C:39]([O:44][C:45]3[C:46]([CH3:51])=[N:47][CH:48]=[CH:49][CH:50]=3)[C:40]([NH2:43])=[N:41][CH:42]=2)=[N:32][CH:33]=[CH:34][CH:35]=1>C(#N)C>[CH3:29][C:30]1[C:31]([S:36][C:37]2[CH:38]=[C:39]([O:44][C:45]3[C:46]([CH3:51])=[N:47][CH:48]=[CH:49][CH:50]=3)[C:40]([NH:43][C:2]3[S:3][N:16]=[C:17]([C@H:18]4[CH2:22][O:21][C:20]5([CH2:23][CH2:24][CH2:25][CH2:26][CH2:27]5)[O:19]4)[N:1]=3)=[N:41][CH:42]=2)=[N:32][CH:33]=[CH:34][CH:35]=1

Participants

6

Reactant 4

HCID 1049PyridineHCID 10953423IsothiocyanatosodiumHCID 674860565-(3-Methylpyridin-2-ylthio)-3-(2-methylpyridin-3-yloxy)pyridin-2-amineHCID 86644147(R)-N-(methylsulfonyloxy)-1,4-dioxaspiro[4.5]decane-2-carbimidoyl chloride

Product 1

HCID 68473492(S)-N-(5-(3-methylpyridin-2-ylthio)-3-(2-methylpyridin-3-yloxy)pyridin-2-yl)-3-(1,4-dioxaspiro[4.5]decan-2-yl)-1,2,4-thiadiazol-5-amineYield 66.8%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Conditions

Temperature
60 °C

Procedure

To acetonitrile (50 mL) was added sodium isothiocyanate (0.1749 g, 2.158 mmol), pyridine (0.3740 ml, 4.624 mmol), followed by (R)-N-(methylsulfonyloxy)-1,4-dioxaspiro[4.5]decane-2-carbimidoyl chloride (0.5507 g, 1.850 mmol), and the resulting mixture was heated to 60° C. for 30 minutes. 5-(3-Methylpyridin-2-ylthio)-3-(2-methylpyridin-3-yloxy)pyridin-2-amine (0.500 g, 1.541 mmol) was added and the reaction was stirred overnight at 60° C. The reaction was concentrated in vacuo and the residue was partitioned between ethyl acetate and 1N NaOH. The organic layer was separated and the aqueous layer was extracted with ethyl acetate. The combined organic layers were washed with brine, dried (MgSO4) and concentrated. The residue was dried over silica gel (100% ethyl acetate). Concentration of the major UV active fraction with an Rf of 0.5 afforded (S)-N-(5-(3-methylpyridin-2-ylthio)-3-(2-methylpyridin-3-yloxy)pyridin-2-yl)-3-(1,4-dioxaspiro[4.5]decane-2-yl)-1,2,4-thiadiazol-5-amine (0.565 g, 1.030 mmol, 66.8% yield) as an off white powder/crystals.

Workup

  1. concentrationThe reaction was concentrated in vacuo
  2. customthe residue was partitioned between ethyl acetate and 1N NaOH
  3. customThe organic layer was separated
  4. extractionthe aqueous layer was extracted with ethyl acetate
  5. washThe combined organic layers were washed with brine
  6. dry with materialdried (MgSO4)
  7. concentrationconcentrated
  8. customThe residue was dried over silica gel (100% ethyl acetate)

Sources & evidence

ORD record
ord-f0e8a023eceb440ca829371038837546
Source dataset
uspto-grants-2014_10
Patent number
US08853409B2

Reaction notes

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