N,N,N',N'-Tetramethylazodicarboxamide → HCID 59263410, compound

HRID 425696Notes

Reaction equation

HRID 425696 reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]2([C:13]3=[CH:14][C:15]4[O:19][CH2:18][O:17][C:16]=4[CH:20]=[C:12]3[O:11][CH2:10]2)[C:2]1=[O:21].[Cl:22][C:23]1[S:27][C:26]([CH2:28]O)=[N:25][N:24]=1.C(P(CCCC)CCCC)CCC.CN(C)C(N=NC(N(C)C)=O)=O>O1CCCC1>[Cl:22][C:23]1[S:27][C:26]([CH2:28][N:1]2[C:9]3[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=3)[C:3]3([C:13]4=[CH:14][C:15]5[O:19][CH2:18][O:17][C:16]=5[CH:20]=[C:12]4[O:11][CH2:10]3)[C:2]2=[O:21])=[N:25][N:24]=1

Participants

6

Reactant 4

HCID 4278N,N,N',N'-TetramethylazodicarboxamideHCID 13831TributylphosphineHCID 45123407(5-Chloro-1,3,4-thiadiazol-2-yl)methanolHCID 53375495spiro[furo[2,3-f][1,3]benzodioxole-7,3'-indol]-2'(1'H)-one

Product 1

HCID 59263410HCID 59263410, compoundYield 24.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of spiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one (0.56 g, 1.99 mmol) and (5-chloro-1,3,4-thiadiazol-2-yl)methanol (0.30 g, 1.99 mmol) in anhydrous tetrahydrofuran (12.0 mL) was added tributylphosphine (0.60 g, 2.99 mmol) at 0° C. The reaction mixture was stirred for 15 min followed by the addition of N,N,N′,N′-tetramethylazodicarboxamide (0.51 g, 2.99 mmol). The reaction mixture was stirred at ambient temperature overnight, quenched with aqueous ammonium chloride (10.0 mL) and diluted with ethyl acetate (350 mL). The organic layer was washed with aqueous saturated sodium chloride (2×25.0 mL), dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo to dryness. The residue was subjected to column chromatography (ethyl acetate/hexane, 1/2) to give the title compound (0.20 g, 24%) as a yellowish solid: mp 194-197° C.; 1H NMR (300 MHz, DMSO-d6,) δ 7.30 (dt, 1H), 7.20-7.12 (m, 2H), 7.05 (dt, 1H), 6.67 (s, 1H), 6.28 (s, 1H), 5.90 (s, 2H), 5.43 (d, 1H), 5.34 (d, 1H), 4.78 (d, 1H), 4.67 (d, 1H); 13C NMR (75 MHz, DMSO-d6) δ 177.2, 168.3, 155.8, 155.4, 148.9, 142.2, 141.9, 132.2, 129.4, 124.2, 124.0, 120.1, 109.8, 103.7, 101.9, 93.8, 80.1, 67.5, 57.9, 25.6; MS (ES+) m/z 414.2 (M +1), 416.2 (M+1).

Workup

  1. stirringThe reaction mixture was stirred at ambient temperature overnight
  2. customquenched with aqueous ammonium chloride (10.0 mL)
  3. additiondiluted with ethyl acetate (350 mL)
  4. washThe organic layer was washed with aqueous saturated sodium chloride (2×25.0 mL)
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationThe filtrate was concentrated in vacuo to dryness

Sources & evidence

ORD record
ord-9f54c65d8ccd41c4a879119a4d3155a9
Source dataset
uspto-grants-2012_01
Patent number
US08106087B2

Reaction notes

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