1,4-Dioxane → N-(7-(2,2-difluorobenzo[d][1,3]dioxol-5-yl)-2-methylpyrazolo[1,5-a]pyrimidin-5-yl)-4-(2-hydroxypropan-2-yl)benzamide

HRID 1256386Notes

Reaction equation

HRID 1256386 reaction equation
Cl[C:2]1[N:7]2[N:8]=[C:9]([CH3:11])[CH:10]=[C:6]2[N:5]=[C:4]([NH:12][C:13](=[O:24])[C:14]2[CH:19]=[CH:18][C:17]([C:20]([OH:23])([CH3:22])[CH3:21])=[CH:16][CH:15]=2)[CH:3]=1.[F:25][C:26]1([F:38])[O:30][C:29]2[CH:31]=[CH:32][C:33](B(O)O)=[CH:34][C:28]=2[O:27]1.O1CCOCC1>CO.C1(P(C2C=CC=CC=2)[C-]2C=CC=C2)C=CC=CC=1.[C-]1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=C1.[Fe+2].Cl[Pd]Cl>[F:38][C:26]1([F:25])[O:27][C:28]2[CH:34]=[CH:33][C:32]([C:2]3[N:7]4[N:8]=[C:9]([CH3:11])[CH:10]=[C:6]4[N:5]=[C:4]([NH:12][C:13](=[O:24])[C:14]4[CH:19]=[CH:18][C:17]([C:20]([OH:23])([CH3:22])[CH3:21])=[CH:16][CH:15]=4)[CH:3]=3)=[CH:31][C:29]=2[O:30]1

Participants

7

Reactant 3

HCID 312751,4-DioxaneHCID 17750030(2,2-Difluoro-1,3-dioxaindan-5-yl)boronic acidHCID 86652267N-(7-chloro-2-methylpyrazolo[1,5-a]pyrimidin-5-yl)-4-(2-hydroxypropan-2-yl)benzamide

Product 1

HCID 67064732N-(7-(2,2-difluorobenzo[d][1,3]dioxol-5-yl)-2-methylpyrazolo[1,5-a]pyrimidin-5-yl)-4-(2-hydroxypropan-2-yl)benzamideYield 39%

Reagents, catalysts & solvents 3

HCID 24290Palladium ChlorideCatalystHCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)CatalystHCID 887MethanolSolvent

Conditions

Temperature
110 °C

Procedure

A suspension of N-(7-chloro-2-methylpyrazolo[1,5-a]pyrimidin-5-yl)-4-(2-hydroxypropan-2-yl)benzamide (2F, 60 mg, 0.174 mmol), 2,2-difluorobenzo[d][1,3]dioxol-5-ylboronic acid (46 mg, 0.226 mmol), and 1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) (10 mg, 13.6 μmol) in 2:1 1,4-dioxane/saturated aqueous NaHCO3 (0.58 mL of 1,4-dioxane and 0.29 mL of saturated aqueous NaHCO3) was prepared in a 10 mL microwave reaction vessel and the sealed reaction vessel warmed to 110° C. for 10 minutes in a CEM microwave reactor. The reaction mixture was cooled to rt, diluted with methanol, filtered, and purified via preparative HPLC (60-75% MeCN/H2O gradient+0.01% TFA). Lyophilization of the combined fractions gave the titled compound as a yellow solid (31.4 mg, 39%). 1H NMR (DMSO-d6) δ: 11.21 (s, 1H), 8.62 (d, J=1.3 Hz, 1H), 8.26 (d, J=8.6 Hz, 1H), 8.05 (s, 1H), 7.99-8.04 (m, 3H), 7.93 (d, J=5.3 Hz, 1H), 7.67 (d, J=5.6 Hz, 1H), 7.61 (d, J=8.6 Hz, 2H), 6.41 (s, 1H), 5.20 (s, 1H), 2.41 (s, 3H), 1.46 (s, 6H); ESI-MS: m/z 467.2 (M+H)+.

Workup

  1. customwas prepared in a 10 mL microwave reaction vessel
  2. customthe sealed reaction vessel
  3. temperatureThe reaction mixture was cooled to rt
  4. filtrationfiltered
  5. custompurified via preparative HPLC (60-75% MeCN/H2O gradient+0.01% TFA)

Sources & evidence

ORD record
ord-fddbc337128e4b15b66579218add5791
Source dataset
uspto-grants-2013_06
Patent number
US08461163B2

Reaction notes

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