Diisopropylethylamine → HCID 89791481, compound

HRID 470584Notes

Reaction equation

HRID 470584 reaction equation
[C:1]1([C:7]2[C:11]([C:12]([F:15])([F:14])[F:13])=[C:10]([C:16](F)=[O:17])[O:9][N:8]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[N:19]([CH:22]1[CH:31]([OH:32])[C:30]2[C:25](=[CH:26][C:27]([C:33](=[N:35]O)[NH2:34])=[CH:28][CH:29]=2)[O:24][CH2:23]1)=[N+:20]=[N-:21].CCN(C(C)C)C(C)C>C(#N)C>[N:19]([CH:22]1[CH:31]([OH:32])[C:30]2[C:25](=[CH:26][C:27]([C:33]3[N:35]=[C:16]([C:10]4[O:9][N:8]=[C:7]([C:1]5[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=5)[C:11]=4[C:12]([F:15])([F:14])[F:13])[O:17][N:34]=3)=[CH:28][CH:29]=2)[O:24][CH2:23]1)=[N+:20]=[N-:21]

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 58374067HCID 58374067, compoundHCID 131731134HCID 131731134, compound

Product 1

HCID 89791481HCID 89791481, compoundYield 59.3%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of 3-phenyl-4-(trifluoromethyl)isoxazole-5-carbonyl fluoride Int-1-G (273 mg, 1.05 mmol) in ACN (6.7 mL) was added racemic (3R*,4S*,E/Z)-3-azido-N′,4-dihydroxychroman-7-carboximidamide (250 mg, 1.0 mmol) and Hunig's Base (210 μL, 1.2 mmol). The resulting solution was stirred overnight. Next, the solvent was evaporated. The resulting residue was purified by column chromatography (ISCO Combiflash Companion, 12 g silica gel, 10% ethyl acetate-hexane for 5 min then ramp to 50% ethyl acetate-hexane over 7 min then 50% ethyl acetate-hexane for 3 more min, product came out 8-10 min) to give racemic (3R*,4S*)-3-azido-7-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)chroman-4-ol (280 mg, 0.59 mmol, 59.3% yield): LCMS=470.98 [M+H]+, 1H NMR (400 MHz, CDCl3) δ ppm 7.82 (1H, dd, J=8.03, 1.65 Hz), 7.66-7.72 (3H, m), 7.52-7.62 (4H, m), 4.96-5.02 (1H, m), 4.43-4.51 (1H, m), 4.32-4.38 (1H, m), 4.08-4.17 (1H, m).

Workup

  1. customNext, the solvent was evaporated
  2. customThe resulting residue was purified by column chromatography (ISCO Combiflash Companion, 12 g silica gel, 10% ethyl acetate-hexane for 5 min
  3. waitthen ramp to 50% ethyl acetate-hexane over 7 min
  4. wait50% ethyl acetate-hexane for 3 more min, product came out 8-10 min

Sources & evidence

ORD record
ord-bb5c5922425741c8ae9be2163c014092
Source dataset
uspto-grants-2014_01
Patent number
US08629282B2

Reaction notes

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