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

HRID 1465882Notes

Reaction equation

HRID 1465882 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]([OH:22])=O)[N:14]=2)[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.[O:25]=[S:26]1(=[O:33])[CH2:30][CH2:29][CH:28]([NH:31][NH2:32])[CH2:27]1.C(P1(=O)OP(CCC)(=O)OP(CCC)(=O)O1)CC.CCN(C(C)C)C(C)C>CCOC(C)=O>[F:1][C:2]([F:23])([F:24])[C:3]1[CH:4]=[C:5]([C:13]2[N:17]=[CH:16][N:15](/[CH:18]=[CH:19]\[C:20]([NH:32][NH:31][CH:28]3[CH2:29][CH2:30][S:26](=[O:33])(=[O:25])[CH2:27]3)=[O:22])[N:14]=2)[CH:6]=[C:7]([C:9]([F:11])([F:10])[F:12])[CH:8]=1

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 103013(tetrahydro-3-thienyl)hydrazine S,S-dioxideHCID 111923Propylphosphonic anhydrideHCID 86703006(Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)acrylic acid

Product 1

HCID 71493153(Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-N'-(1,1-dioxotetrahydrothiophen-3yl)acrylohydrazideYield 87.2%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
-60 °C

Procedure

A 50-mL, 3-necked, round-bottomed flask charged with a solution of (Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)acrylic acid (0.5 g) in EtOAc (20.0 mL) was treated with 2-(1,1-dioxotetrahydrothiophen-3-yl)hydrazine (0.3 g, 1.2 eq.). The mixture was cooled to −60° C. and treated simultaneously with T3P (50% in EtOAc; 2.0 mL, 2 eq.) and DIPEA (1 mL, 4 eq.). The reaction mixture was stirred for 30 min at −60° C. before being concentrated under reduced pressure (35° C., 20 mmHg) to afford 0.60 g of a solid residue. Purification by column chromatography (SiO2; elution with MeOH:CH2Cl2; desired compound eluted at 5% MeOH in CH2Cl2) afforded 100 mg (yield=15%) (Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-N′-(tetrahydrothiophen-1-1-dioxide-3-yl)acrylohydrazide. 1H NMR (400 MHz, CD3OD) δ=9.57 (s, 1H), 8.64 (s, 2H), 8.10 (s, 1H), 7.34-7.36 (d, J=10.4 Hz, 1H), 5.89-5.92 (d, J=10.8 Hz, 1H), 4.01 (m, 1H), 3.04-3.26 (m, 4H), 2.27-2.34 (m, 2H). LCMS for C17H15F6N5O3S [M+H]+ 484.40. found 483.39 (RT 2.63 min, purity: 66.39%).

Workup

  1. concentrationbefore being concentrated under reduced pressure (35° C., 20 mmHg)

Sources & evidence

ORD record
ord-b2c023386561458f8d630eda226c7c56
Source dataset
uspto-grants-2015_04
Patent number
US08999996B2

Reaction notes

Loading…