Triethyl orthoacetate → 3-(8-bromo-4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-2-yl)-4-(2-chlorophenyl)-5-methyl-4H-1,2,4-triazole

HRID 84561Notes

Reaction equation

[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[C:11]3[S:12][C:13]([C:15](=[N:24][NH2:25])[NH:16][C:17]4[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=4[Cl:23])=[CH:14][C:10]=3[CH2:9][CH2:8][O:7][C:6]=2[CH:26]=1.[C:27](OCC)(OCC)(OCC)[CH3:28]>>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[C:11]3[S:12][C:13]([C:15]4[N:16]([C:17]5[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=5[Cl:23])[C:27]([CH3:28])=[N:25][N:24]=4)=[CH:14][C:10]=3[CH2:9][CH2:8][O:7][C:6]=2[CH:26]=1

Participants

Reactant 2

HCID 66221Triethyl orthoacetate

HCID 178514378HCID 178514378, compound

Product 1

HCID 579002613-(8-bromo-4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-2-yl)-4-(2-chlorophenyl)-5-methyl-4H-1,2,4-triazole

Procedure

A solution of crude 8-bromo-N-(2-chlorophenyl)-4,5-dihydrobenzo[b]thieno[2,3-d]oxepine-2-carbohydrazonamide (150 mg) was heated in a sealed vessel with triethyl orthoacetate at 90° C. for 3 h. The mixture was cooled to room temperature and concentrated to give a crude residue that was purified by flash column chromatography (10-100% ethyl acetate in hexanes) to give 272. 1H NMR (dmso-d6, 400 MHz) δ 7.86 (m, 2H), 7.48 (m, 1H), 7.69 (m, 1H), 7.44 (m, 1H), 7.28-7.23 (m, 2H), 6.57 (s, 1H), 4.22 (t, 2H), 3.00 (t, 2H), 2.18 (s, 3H). MS (ESI) 474.0

Workup

concentrationconcentrated
customto give a crude residue that
customwas purified by flash column chromatography (10-100% ethyl acetate in hexanes)

Sources & evidence

ORD record: ord-fdd248c9e22d4e83b26ed3ce69cca20d
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846762B2

Reaction notes

Loading…