Hydrochloric Acid → HCID 57969026, compound

HRID 1471530Notes

Reaction equation

HRID 1471530 reaction equation
C([Si](C)(C)[O:6][CH2:7][CH2:8][N:9]([CH3:36])[C:10]1[CH:17]=[CH:16][C:13]([C:14]#[N:15])=[C:12]([O:18][C:19]2[CH:24]=[CH:23][C:22]([B:25]3[O:29][C:28](C)(C)C(C)(C)[O:26]3)=[C:21](C=O)[CH:20]=2)[N:11]=1)(C)(C)C.[BH4-].[Na+].Cl>CO>[OH:26][B:25]1[C:22]2[CH:23]=[CH:24][C:19]([O:18][C:12]3[N:11]=[C:10]([N:9]([CH2:8][CH2:7][OH:6])[CH3:36])[CH:17]=[CH:16][C:13]=3[C:14]#[N:15])=[CH:20][C:21]=2[CH2:28][O:29]1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 4311764Sodium borohydrideHCID 57969223HCID 57969223, compound

Product 1

HCID 57969026HCID 57969026, compoundYield 17.4%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a clear solution of 6-{[2-(tert-butyl-dimethyl-silanyloxy)-ethyl]-methyl-amino}-2-[3-formyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenoxy]-nicotinonitrile (11) (485 mg, 0.903 mmol) in MeOH (anhydrous, 100 mL) was slowly added NaBH4 (101 mg, 2.65 mmol). The reaction was stirred at room temperature for 4 hours, before the addition of HCl solution (1 M, 60 mL). The stirring was kept at room temperature overnight. Then the solution was slowly evaporated in vacuo. Purification was accomplished by reverse phase Biotage with 10%-100% MeOH/H2O gradient to afford 51 mg (13.8% yield) of the desired product. 1H NMR (400 MHz, DMSO-d6) δ ppm 9.22 (s, 1 H), 7.92 (d, J=8.6 Hz, 1 H), 7.75 (d, J=8.2 Hz, 1 H), 7.24 (s, 1 H), 7.16 (dd, J=7.8, 2.0 Hz, 1 H), 6.43 (br. s., 1 H), 4.98 (s, 2 H), 3.90 (br. s., 1 H), 3.47 (br. s., 2 H), 3.39 (s, 2H, masked), 2.95 (br. s., 3 H); HPLC: 98.18% (220 nm), 99.15% (254 nm), 99.16 (MaxPlot).

Workup

  1. customThen the solution was slowly evaporated in vacuo
  2. customPurification

Sources & evidence

ORD record
ord-b6ecc23261f14f68810be94d4ccc4515
Source dataset
uspto-grants-2015_04
Patent number
US09012431B2

Reaction notes

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