1,4-Dioxane → tert-Butyl{3-[2,6-dimethoxy-4-(methoxymethyl)phenyl]-6-methoxy-2-methoxypyrazolo[5,1-b][1,3]thiazol-7-yl}carbamate

HRID 41273

Reaction equation

[O:1]1CCOC[CH2:2]1.[C:7]([O:11][C:12](=[O:38])[NH:13][C:14]1[C:15]([O:36][CH3:37])=[N:16][N:17]2[C:21]([C:22]3[C:27]([O:28][CH3:29])=[CH:26][C:25]([CH2:30][O:31][CH3:32])=[CH:24][C:23]=3[O:33][CH3:34])=[C:20](Br)[S:19][C:18]=12)([CH3:10])([CH3:9])[CH3:8].C[Zn]C>CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C.CCCCCCC.C(OCC)(=O)C>[C:7]([O:11][C:12](=[O:38])[NH:13][C:14]1[C:15]([O:36][CH3:37])=[N:16][N:17]2[C:21]([C:22]3[C:27]([O:28][CH3:29])=[CH:26][C:25]([CH2:30][O:31][CH3:32])=[CH:24][C:23]=3[O:33][CH3:34])=[C:20]([O:1][CH3:2])[S:19][C:18]=12)([CH3:10])([CH3:9])[CH3:8]

Participants

Conditions

Temperature: 60 °C

Procedure

To a dioxane (15 mL) solution of tert-butyl{2-bromo-3-[2,6-dimethoxy-4-(methoxymethyl)phenyl]-6-methoxypyrazolo[5,1-b][1,3]thiazol-7-yl}carbamate (323 mg, 0.612 mmol) were added 2M dimethyl zinc (0.612 mL, 1.22 mmol) and bis(tri-tert-butylphosphine)palladium(0) (15.6 mg, 0.031 mmol), and the mixture was heated at 60° C. for one hour. After the reaction was completed, the solvent was directly distilled off under reduced pressure. The residue was purified by silica gel column chromatography (a mixed solvent of n-heptane and ethyl acetate: n-heptane/ethyl acetate=1/1) to obtain the title compound (205 mg, 0.442 mmol).

Workup

distillationthe solvent was directly distilled off under reduced pressure
customThe residue was purified by silica gel column chromatography (a mixed solvent of n-heptane and ethyl acetate

Sources & evidence

ORD record: ord-191f418fb6ab49d39998070494b19864
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08530504B2

Linked notes

Loading…