Trifluoroacetic acid → (S)-9-methylthio-5-[3-(5-trifluoromethyl-1,2,4-oxadiazol-3-yl)phenyl]-1,2,3,3a,4,5-hexahydro-5,8,10,10b-tetraazabenzo[e]azulen-6-one

HRID 1672797Notes

Reaction equation

[OH:1][N:2]=[C:3]([NH2:27])[C:4]1[CH:9]=[CH:8][CH:7]=[C:6]([N:10]2[CH2:19][C@H:18]3[N:14]([CH2:15][CH2:16][CH2:17]3)[C:13]3[N:20]=[C:21]([S:24][CH3:25])[N:22]=[CH:23][C:12]=3[C:11]2=[O:26])[CH:5]=1.C(N(CC)CC)C.[F:35][C:36]([F:41])([F:40])[C:37](O)=O>ClCCl>[CH3:25][S:24][C:21]1[N:22]=[CH:23][C:12]2[C:11](=[O:26])[N:10]([C:6]3[CH:7]=[CH:8][CH:9]=[C:4]([C:3]4[N:27]=[C:37]([C:36]([F:41])([F:40])[F:35])[O:1][N:2]=4)[CH:5]=3)[CH2:19][C@H:18]3[N:14]([CH2:15][CH2:16][CH2:17]3)[C:13]=2[N:20]=1

Participants

Conditions

Temperature: 0 °C

Procedure

(S)—N′-Hydroxy-3-(9-methylthio-6-oxo-2,3,3a,4-tetrahydro-1H,6H-5,8,10,10b-tetraazabenzo[e]azulen-5-yl)benzamidine (190 mg, 0.49 mmol) obtained in Step 1 of Example 75 was dissolved in dichloromethane (1.5 mL), and the mixture was cooled to 0° C. after adding triethylamine (0.14 mL, 0.99 mmol). Thereafter, anhydrous trifluoroacetic acid (0.14 mL, 0.99 mmol) was added dropwise, and the mixture was stirred at room temperature for 1 hour. The residue obtained by concentrating the mixture under reduced pressure was then purified by silica gel column chromatography to give (S)-9-methylthio-5-[3-(5-trifluoromethyl-1,2,4-oxadiazol-3-yl)phenyl]-1,2,3,3a,4,5-hexahydro-5,8,10,10b-tetraazabenzo[e]azulen-6-one (186 mg, 81%).

Workup

customThe residue obtained
concentrationby concentrating the mixture under reduced pressure
customwas then purified by silica gel column chromatography

Sources & evidence

ORD record: ord-4e16aed9c085479a8bba7b0fc5b7fa7e
Source dataset: uspto-grants-2011_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07998954B2

Reaction notes

Loading…