Potassium Carbonate → (2S)-Methyl 2-(7-(4-allyl-5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-2-(2'-(but-3-en-1-yl)-[1,1'-biphenyl]-3-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate

HRID 1400698Notes

Reaction equation

HRID 1400698 reaction equation
[CH2:1]([N:4]1[CH2:9][CH2:8][O:7][C:6]2[CH:10]=[CH:11][C:12]([C:15]3[N:20]4[N:21]=[C:22]([C:24]5[CH:29]=[CH:28][CH:27]=[C:26](Br)[CH:25]=5)[CH:23]=[C:19]4[N:18]=[C:17]([CH3:31])[C:16]=3[C@H:32]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])[C:33]([O:35][CH3:36])=[O:34])=[C:13]([Cl:14])[C:5]1=2)[CH:2]=[CH2:3].[CH2:42]([C:46]1[CH:51]=[CH:50][CH:49]=[CH:48][C:47]=1B(OC)OC)[CH2:43][CH:44]=[CH2:45].C([O-])([O-])=O.[K+].[K+]>CN(C=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH2:1]([N:4]1[CH2:9][CH2:8][O:7][C:6]2[CH:10]=[CH:11][C:12]([C:15]3[N:20]4[N:21]=[C:22]([C:24]5[CH:25]=[C:26]([C:47]6[CH:48]=[CH:49][CH:50]=[CH:51][C:46]=6[CH2:42][CH2:43][CH:44]=[CH2:45])[CH:27]=[CH:28][CH:29]=5)[CH:23]=[C:19]4[N:18]=[C:17]([CH3:31])[C:16]=3[C@H:32]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])[C:33]([O:35][CH3:36])=[O:34])=[C:13]([Cl:14])[C:5]1=2)[CH:2]=[CH2:3]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 86710751(2S)-methyl 2-(7-(4-allyl-5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-2-(3-bromophenyl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetateHCID 89973446Dimethyl (2-(but-3-en-1-yl)phenyl)boronate

Product 1

HCID 86710772(2S)-Methyl 2-(7-(4-allyl-5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-2-(2'-(but-3-en-1-yl)-[1,1'-biphenyl]-3-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetateYield 60.2%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
90 °C

Procedure

To a 2-5 ml microwave tube was added (2S)-methyl 2-(7-(4-allyl-5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-2-(3-bromophenyl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate (0.060 g, 0.094 mmol), dimethyl (2-(but-3-en-1-yl)phenyl)boronate (0.029 g, 0.141 mmol), and 2.0 M aqueous K2CO3 (0.094 ml, 0.188 mmol) in DMF (1 ml). The reaction was sparged with nitrogen for 10 minutes, treated with Pd(Ph3P)4 (10.83 mg, 9.38 pmol), then sparged for 15 min. The reaction tube was sealed and then heated (90° C., heating block) for 2.5 h. The reaction was cooled, then diluted with Et2O (20 mL) and washed with water, then brine (20 mL). The organic layer was dried (Na2SO4), filtered, and concentrated under reduced pressure to an orange oil (˜80 mg). The crude was purified by Biotage column chromatography, and product fractions were pooled and concentrated under reduced pressure, to afford (2S)-methyl 2-(7-(4-allyl-5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-2-(2′-(but-3-en-1-yl)-[1,1′-biphenyl]-3-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate (0.039 g, 0.056 mmol, 60.2% yield). 1H NMR (500 MHz, CDCl3) δ: 7.85 (d, J=7.8 Hz, 1H), 7.78-7.82 (m, 1H), 7.42 (t, J=7.7 Hz, 1H), 7.30-7.35 (m, 2H), 7.25 (t, J=3.4 Hz, 2H), 6.93-7.01 (m, 2H), 6.89 (s, 1H), 5.97-6.10 (m, 1H), 5.69 (ddt, J=16.9, 10.3, 6.7 Hz, 1H), 5.32 (m, J=17.2, 1.4 Hz, 1H), 5.23 (m, J=10.3, 1.3 Hz, 1H), 4.81-4.94 (m, 2H), 4.25 (t, J=4.4 Hz, 2H), 3.66-3.75 (m, 1H), 3.65 (s, 3H), 3.55-3.62 (m, 1H), 3.19 (q, J=3.9 Hz, 2H), 2.84 (s, 3H), 2.64-2.71 (m, 2H), 2.18-2.28 (m, 2H), 1.25-1.33 (m, 1H), 1.17 (s, 9H). LCMS (M+H)=691.5.

Workup

  1. customThe reaction was sparged with nitrogen for 10 minutes
  2. customsparged for 15 min
  3. customThe reaction tube was sealed
  4. temperatureheated
  5. temperatureThe reaction was cooled
  6. additiondiluted with Et2O (20 mL)
  7. washwashed with water
  8. dry with materialThe organic layer was dried (Na2SO4)
  9. filtrationfiltered
  10. concentrationconcentrated under reduced pressure to an orange oil (˜80 mg)
  11. customThe crude was purified by Biotage column chromatography, and product fractions
  12. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-43d876cf9ae9471c898b3a605e8b226b
Source dataset
uspto-grants-2014_12
Patent number
US08906929B2

Reaction notes

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