Sodium hydride → (S)-ethyl 2-(2-(3-(2-(benzyloxy)-3,5-difluorophenyl)prop-1-en-1-yl)-7-(4-(((R)-5-((tert-butyldiphenylsilyl)oxy)hexyl)oxy)-4-methylpiperidin-1-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate

HRID 921172Notes

Reaction equation

HRID 921172 reaction equation
[I-].[CH2:2]([O:9][C:10]1[C:36]([F:37])=[CH:35][C:34]([F:38])=[CH:33][C:11]=1[CH2:12][CH2:13][P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[H-].[Na+].[C:41]([O:45][C@@H:46]([C:52]1[C:53]([CH3:95])=[N:54][C:55]2[N:56]([N:90]=[C:91]([CH:93]=O)[CH:92]=2)[C:57]=1[N:58]1[CH2:63][CH2:62][C:61]([O:65][CH2:66][CH2:67][CH2:68][CH2:69][C@H:70]([O:72][Si:73]([C:86]([CH3:89])([CH3:88])[CH3:87])([C:80]2[CH:85]=[CH:84][CH:83]=[CH:82][CH:81]=2)[C:74]2[CH:79]=[CH:78][CH:77]=[CH:76][CH:75]=2)[CH3:71])([CH3:64])[CH2:60][CH2:59]1)[C:47]([O:49][CH2:50][CH3:51])=[O:48])([CH3:44])([CH3:43])[CH3:42]>C1COCC1>[CH2:2]([O:9][C:10]1[C:36]([F:37])=[CH:35][C:34]([F:38])=[CH:33][C:11]=1[CH2:12][CH:13]=[CH:93][C:91]1[CH:92]=[C:55]2[N:54]=[C:53]([CH3:95])[C:52]([C@H:46]([O:45][C:41]([CH3:44])([CH3:43])[CH3:42])[C:47]([O:49][CH2:50][CH3:51])=[O:48])=[C:57]([N:58]3[CH2:63][CH2:62][C:61]([O:65][CH2:66][CH2:67][CH2:68][CH2:69][C@H:70]([O:72][Si:73]([C:86]([CH3:87])([CH3:88])[CH3:89])([C:74]4[CH:75]=[CH:76][CH:77]=[CH:78][CH:79]=4)[C:80]4[CH:81]=[CH:82][CH:83]=[CH:84][CH:85]=4)[CH3:71])([CH3:64])[CH2:60][CH2:59]3)[N:56]2[N:90]=1)[C:3]1[CH:4]=[CH:5][CH:6]=[CH:7][CH:8]=1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 131734911(S)-ethyl 2-(tert-butoxy)-2-(7-(4-(((R)-5-((tert-butyldiphenylsilyl)oxy)hexyl)oxy)-4-methylpiperidin-1-yl)-2-formyl-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)acetateHCID 131734916(2-(Benzyloxy)-3,5-difluorophenethyl)triphenylphosphonium, iodide salt

Product 1

HCID 131734917(S)-ethyl 2-(2-(3-(2-(benzyloxy)-3,5-difluorophenyl)prop-1-en-1-yl)-7-(4-(((R)-5-((tert-butyldiphenylsilyl)oxy)hexyl)oxy)-4-methylpiperidin-1-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetateYield 73.4%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a suspension of (2-(benzyloxy)-3,5-difluorophenethyl)triphenylphosphonium, iodide salt (330 mg, 0.519 mmol) in THF (4 ml) at 0° C. was added NaH (21.27 mg, 0.532 mmol) and the resulting mixture was stirred at rt for 45 min. The mixture was cooled to 0° C. rd (S)-ethyl 2-(tert-butoxy)-2-(7-(4-(((R)-5-((tert-butyldiphenylsilyl)oxy)hexyl)oxy)-4-methylpiperidin-1-yl)-2-formyl-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)acetate (200 mg, 0.259 mmol) dissolved in THF (4 ml) was added dropwise and the mixture was stirred at 0° C. for 1 h then warmed to rt and stirred 2 h. The reaction was quenched with water and the product was extracted with EtOAc. The organic phase was washed with brine, dried (Na2SO4), filtered and concentrated. The residue was purified by flash chromatography (Biotage; 0%-30% EtOAc/hexane) to afford (S)-ethyl 2-(2-(3-(2-(benzyloxy)-3,5-difluorophenyl)prop-1-en-1-yl)-7-(4-(((R)-5-((tert-butyldiphenylsilyl)oxy)hexyl)oxy)-4-methylpiperidin-1-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate (190 mg, 0.190 mmol, 73% yield) as mixture of E and Z isomers. LCMS (M+H)=1002.0.

Workup

  1. additionwas added dropwise
  2. stirringthe mixture was stirred at 0° C. for 1 h
  3. temperaturethen warmed to rt
  4. stirringstirred 2 h
  5. customThe reaction was quenched with water
  6. extractionthe product was extracted with EtOAc
  7. washThe organic phase was washed with brine
  8. dry with materialdried (Na2SO4)
  9. filtrationfiltered
  10. concentrationconcentrated
  11. customThe residue was purified by flash chromatography (Biotage; 0%-30% EtOAc/hexane)

Sources & evidence

ORD record
ord-a73230f6cfa7450b8ad010edb027370b
Source dataset
uspto-grants-2016_03
Patent number
US09273067B2

Reaction notes

Loading…