Sodium triacetoxyborohydride → {1-(cis-4-{[6-(2-Hydroxyethyl)-2-(trifluoromethyl)pyrimidin-4-yl]oxy}cyclohexyl)-3-[4-(7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]azetidin-3-yl}acetonitrile

HRID 2200802Notes

Reaction equation

HRID 2200802 reaction equation
Cl.Cl.[CH3:3][Si:4]([CH3:31])([CH3:30])[CH2:5][CH2:6][O:7][CH2:8][N:9]1[C:13]2[N:14]=[CH:15][N:16]=[C:17]([C:18]3[CH:19]=[N:20][N:21]([C:23]4([CH2:27][C:28]#[N:29])[CH2:26][NH:25][CH2:24]4)[CH:22]=3)[C:12]=2[CH:11]=[CH:10]1.[OH:32][CH2:33][CH2:34][C:35]1[N:40]=[C:39]([C:41]([F:44])([F:43])[F:42])[N:38]=[C:37]([O:45][CH:46]2[CH2:51][CH2:50][C:49](=O)[CH2:48][CH2:47]2)[CH:36]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>O1CCCC1>[OH:32][CH2:33][CH2:34][C:35]1[N:40]=[C:39]([C:41]([F:44])([F:42])[F:43])[N:38]=[C:37]([O:45][CH:46]2[CH2:51][CH2:50][CH:49]([N:25]3[CH2:24][C:23]([CH2:27][C:28]#[N:29])([N:21]4[CH:22]=[C:18]([C:17]5[C:12]6[CH:11]=[CH:10][N:9]([CH2:8][O:7][CH2:6][CH2:5][Si:4]([CH3:30])([CH3:3])[CH3:31])[C:13]=6[N:14]=[CH:15][N:16]=5)[CH:19]=[N:20]4)[CH2:26]3)[CH2:48][CH2:47]2)[CH:36]=1

Participants

5

Reactant 3

HCID 5049666Sodium triacetoxyborohydrideHCID 67391464{3-[4-(7-{[2-(Trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]azetidin-3-yl}acetonitrile dihydrochlorideHCID 712575084-{[6-(2-Hydroxyethyl)-2-(trifluoromethyl)pyrimidin-4-yl]oxy}cyclohexanone

Product 1

HCID 71259208{1-(cis-4-{[6-(2-Hydroxyethyl)-2-(trifluoromethyl)pyrimidin-4-yl]oxy}cyclohexyl)-3-[4-(7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]azetidin-3-yl}acetonitrileYield 37%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
20 °C

Procedure

{3-[4-(7-{[2-(Trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]azetidin-3-yl}acetonitrile dihydrochloride (1.9 g, 3.9 mmol), and 4-{[6-(2-hydroxyethyl)-2-(trifluoromethyl)pyrimidin-4-yl]oxy}cyclohexanone (1.3 g, 4.3 mmol), in dry tetrahydrofuran (36 mL) were stirred for 15 min under nitrogen. Sodium triacetoxyborohydride (1.7 g, 8.2 mmol) was then added. The mixture was stirred at 20° C. for 16 hours. HPLC and LCMS analysis showed clean conversion to the trans and cis products (M+H 698; 1:1 ratio). The reaction was quenched with water, concentrated, stirred with 20% KHCO3 and extracted with ethyl acetate, dried (Na2SO4), filtered, and evaporated to give 2.8 g. The isomeric products were separated by prep LCMS using a Waters instrument and a 30 mm×100 mm Xbridge C18 column; 60 mL/min; 55% CH3CN—H2O (0.1% NH4OH); 0.5 min; 4.5 gradient to 72%; 24 runs; retention time trans isomer, 4.6 min; cis isomer, 5.4 min. The isolated cis isomer contained <1% residual trans isomer. Yield 1.00 g cis isomer, 37% yield. 1H NMR (500 MHz, CDCl3; also COSY, HSQC, and HMBC): δ8.83 (s, 1H); 8.40 (s, 1H); 8.28 (s, 1H); 7.40 (m, 1H); 6.80 (m, 1H); 6.67 (s, 1H); 5.64 (s, 2H, SEM); 5.17 (m, 111, OCH); 4.01 (t, 211, OCH2); 3.74 (s, 2H, NCH); 3.59 (m, 2H, NCH); 3.55 (t, 2H, SEM); 3.38 (s, 2H, CH2CN); 2.95 (t, 211, CH2); 2.30 (m, 1H, NCH); 2.15 (m, 2H); 1.84 (m, 2H); 1.50 (m, 2H); 1.30 (m, 2H); 0.90 (t, 2H, SEM); −0.92 (s, 9H, SEM).

Workup

  1. customThe reaction was quenched with water
  2. concentrationconcentrated
  3. stirringstirred with 20% KHCO3
  4. extractionextracted with ethyl acetate
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. customevaporated
  8. customto give 2.8 g
  9. customThe isomeric products were separated by prep LCMS
  10. custom0.5 min
  11. customretention time trans isomer, 4.6 min
  12. customcis isomer, 5.4 min

Sources & evidence

ORD record
ord-3842ad3f632e469484463699f0b4e755
Source dataset
uspto-grants-2016_06
Patent number
US09359358B2

Reaction notes

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