Diisopropylethylamine → (Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-1-(3-hydroxy-3-(trifluoromethyl)azetidin-1-yl)prop-2-en-1-one

HRID 1486992Notes

Reaction equation

HRID 1486992 reaction equation
[F:1][C:2]([F:24])([F:23])[C:3]1[CH:4]=[C:5]([C:13]2[N:17]=[CH:16][N:15](/[CH:18]=[CH:19]\[C:20](O)=[O:21])[N:14]=2)[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.Cl.[F:26][C:27]([F:34])([F:33])[C:28]1([OH:32])[CH2:31][NH:30][CH2:29]1.C(P1(=O)OP(CCC)(=O)OP(CCC)(=O)O1)CC.CCN(C(C)C)C(C)C>C(Cl)Cl>[F:24][C:2]([F:1])([F:23])[C:3]1[CH:4]=[C:5]([C:13]2[N:17]=[CH:16][N:15](/[CH:18]=[CH:19]\[C:20]([N:30]3[CH2:31][C:28]([OH:32])([C:27]([F:34])([F:33])[F:26])[CH2:29]3)=[O:21])[N:14]=2)[CH:6]=[C:7]([C:9]([F:10])([F:11])[F:12])[CH:8]=1

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 111923Propylphosphonic anhydrideHCID 467351523-(Trifluoromethyl)azetidin-3-ol hydrochlorideHCID 86703006(Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)acrylic acid

Product 1

HCID 71494588(Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-1-(3-hydroxy-3-(trifluoromethyl)azetidin-1-yl)prop-2-en-1-oneYield 14.8%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
-30 °C

Procedure

(Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)acrylic acid (0.10 g, 1.0 eq.) and 3-(trifluoromethyl)azetidin-3-ol hydrochloride (0.055 g, 1.1 eq.) were dissolved in DCM (3.0 mL) The reaction mixture was cooled to −30° C. where T3P (0.3 mL, 1.5 eq.) and DIPEA (0.12 mL, 2.5 eq.) were added. The reaction mixture was stirred at −30° C. for 30 min. and diluted by DCM, washed with water. The combined organic layers were dried over sodium sulfate and distilled under reduce pressure (250° C., 20 mmHg) to obtain crude product. The crude product was purified by preparative TLC (70% ethyl acetate-Hexane) to yield to 0.020 g of (Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-1-(3-hydroxy-3-(trifluoromethyl)azetidin-1-yl)prop-2-en-1-one. (Yield: 14.8%). 1H NMR (400 MHz, MeOD) δ 9.20 (s, 1H), 8.65 (s, 2H), 8.09 (s, 1H), 7.40-7.43 (d, J=10 Hz, 1H), 5.95-5.93 (d, J=10.6 Hz, 1H), 4.42-4.43 (m, 2H), 4.33-4.05 (m, 2H); LCMS calcd for C17H11F9N4O2 [M+H]+474.3. Found: 475.14 Retention time: 2.872 min,

Workup

  1. additionwere added
  2. washwashed with water
  3. dry with materialThe combined organic layers were dried over sodium sulfate
  4. distillationdistilled
  5. custompressure (250° C., 20 mmHg)
  6. customto obtain crude product
  7. customThe crude product was purified by preparative TLC (70% ethyl acetate-Hexane)

Sources & evidence

ORD record
ord-0e5e624ddea84c58b278cadb1adab570
Source dataset
uspto-grants-2016_08
Patent number
US09428490B2

Reaction notes

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