Stannane, tributyl(1-ethoxyethenyl)- → ethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-(1-ethoxyvinyl)-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(hydroxymethyl)cyclohexanecarboxylate

HRID 334369Notes

Reaction equation

HRID 334369 reaction equation
[CH3:1][Si:2]([CH3:51])([CH3:50])[CH2:3][CH2:4][O:5][CH2:6][N:7]([CH2:42][O:43][CH2:44][CH2:45][Si:46]([CH3:49])([CH3:48])[CH3:47])[C:8]1[N:13]2[N:14]=[CH:15][C:16]([C:17]3[CH:18]=[N:19][N:20]([C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)[CH:21]=3)=[C:12]2[N:11]=[C:10]([CH:28]2[CH2:33][CH2:32][C:31]([CH2:39][OH:40])([C:34]([O:36][CH2:37][CH3:38])=[O:35])[CH2:30][CH2:29]2)[C:9]=1Br.C([Sn](CCCC)(CCCC)[C:57]([O:59][CH2:60][CH3:61])=[CH2:58])CCC>O1CCOCC1.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>[CH3:1][Si:2]([CH3:51])([CH3:50])[CH2:3][CH2:4][O:5][CH2:6][N:7]([CH2:42][O:43][CH2:44][CH2:45][Si:46]([CH3:49])([CH3:48])[CH3:47])[C:8]1[N:13]2[N:14]=[CH:15][C:16]([C:17]3[CH:18]=[N:19][N:20]([C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)[CH:21]=3)=[C:12]2[N:11]=[C:10]([CH:28]2[CH2:33][CH2:32][C:31]([CH2:39][OH:40])([C:34]([O:36][CH2:37][CH3:38])=[O:35])[CH2:30][CH2:29]2)[C:9]=1[C:57]([O:59][CH2:60][CH3:61])=[CH2:58]

Participants

5

Reactant 2

HCID 619414Stannane, tributyl(1-ethoxyethenyl)-HCID 86686667HCID 86686667, compound

Product 1

HCID 66583983ethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-(1-ethoxyvinyl)-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(hydroxymethyl)cyclohexanecarboxylateYield 84.1%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of ethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-bromo-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(hydroxymethyl)cyclohexanecarboxylate (201 mg, 0.251 mmol), tributyl(1-ethoxyvinyl)stannane (0.255 mL, 0.754 mmol), Pd(PPh3)4 (29.0 g, 0.025 mmol) in dioxane was stirred at 100° C. under Ar2 for 16 h. The reaction mixture was passed through a short SiO2/KF (9:1) plug to remove majority of the Sn species, and then purified by a SiO2 column (0-30% EtOAc/Hexanes, Rf=0.7 in 50% EtOAc) to afford ethyl 4-(7-(bis((2-(trimethylsilyl)ethoxy)methyl)amino)-6-(1-ethoxyvinyl)-3-(1-phenyl-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidin-5-yl)-1-(hydroxymethyl)cyclohexanecarboxylate as a pale yellow oil (167 mg). HPLC-MS TR=3.18 min (UV 254 nm, 5 min method); mass calculated for formula C41H62N6O6Si2 790.4, observed LCMS m/z 791.2 (M+H).

Workup

  1. customto remove majority of the Sn species
  2. custompurified by a SiO2 column (0-30% EtOAc/Hexanes, Rf=0.7 in 50% EtOAc)

Sources & evidence

ORD record
ord-f21072a5229341308e3311f591234f9e
Source dataset
uspto-grants-2014_11
Patent number
US08883801B2

Reaction notes

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