Diisopropylethylamine → (Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-N'-(2-morpholinoacetyl)acrylohydrazide

HRID 508682

Reaction equation

HRID 508682 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.[O:25]1[CH2:30][CH2:29][N:28]([CH2:31][C:32]([NH:34][NH2:35])=[O:33])[CH2:27][CH2:26]1.C(P1(=O)OP(CCC)(=O)OP(CCC)(=O)O1)CC.CCN(C(C)C)C(C)C>C(Cl)Cl.CCOC(C)=O>[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]([NH:35][NH:34][C:32](=[O:33])[CH2:31][N:28]3[CH2:29][CH2:30][O:25][CH2:26][CH2:27]3)=[O:21])[N:14]=2)[CH:6]=[C:7]([C:9]([F:12])([F:10])[F:11])[CH:8]=1

Participants

7

Reactant 4

HCID 81531DiisopropylethylamineHCID 111923Propylphosphonic anhydrideHCID 3516352-(4-Morpholinyl)acetohydrazideHCID 86703006(Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)acrylic acid

Product 1

HCID 72203357(Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-N'-(2-morpholinoacetyl)acrylohydrazideYield 14.3%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
-60 °C

Procedure

In a 50 mL, 3-neck round-bottom flask, (Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)acrylic acid (Example 1, Step 4; 0.5 g, 1.0 eq.) was dissolved in CH2Cl2:EtOAc (20 mL, 2:1) and cooled to −60° C. where 2-morpholinoacetohydrazide (0.23 g, 1.0 eq.) was introduced dropwise. T3P (50% in EtOAc) (1.27 mL, 1.5 eq.) was added dropwise followed by DIPEA (0.96 mL, 2 eq.) and the reaction mixture was stirred for 1 h at −60° C. The reaction mixture was concentrated under reduced pressure (25° C., 20 mm Hg) to afford the crude product that was purified by column chromatography (60/120 silica gel) using methanol/dichloromethane gradient (the column was packed in dichloromethane and the desired compound started eluting from 3% methanol/dichloromethane). Fractions containing the desired compounds were combined to afford (Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-N′-(2-morpholinoacetyl)acrylohydrazide (0.1 g, yield: 14%).

Workup

  1. additionwas introduced dropwise
  2. concentrationThe reaction mixture was concentrated under reduced pressure (25° C., 20 mm Hg)
  3. customto afford the crude product that
  4. customwas purified by column chromatography (60/120 silica gel)
  5. washthe desired compound started eluting from 3% methanol/dichloromethane)
  6. additionFractions containing the desired compounds

Sources & evidence

ORD record
ord-ec0cbed2b8ba450b8fe8592d08f8f482
Source dataset
uspto-grants-2015_08
Patent number
US09096543B2

Linked notes

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