Acetic Acid → 1-[2-(2-Chloro-9-methyl-6-morpholin-4-yl-9H-purin-8-yl)ethyl]-4-methylpiperidin-4-ol

HRID 1945642Notes

Reaction equation

HRID 1945642 reaction equation
[Cl:1][C:2]1[N:10]=[C:9]2[C:5]([N:6]=[C:7]([CH2:12][CH:13]=O)[N:8]2[CH3:11])=[C:4]([N:15]2[CH2:20][CH2:19][O:18][CH2:17][CH2:16]2)[N:3]=1.[CH3:21][C:22]1([OH:28])[CH2:27][CH2:26][NH:25][CH2:24][CH2:23]1.C(OC)(OC)OC.C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl>[Cl:1][C:2]1[N:10]=[C:9]2[C:5]([N:6]=[C:7]([CH2:12][CH2:13][N:25]3[CH2:26][CH2:27][C:22]([CH3:21])([OH:28])[CH2:23][CH2:24]3)[N:8]2[CH3:11])=[C:4]([N:15]2[CH2:20][CH2:19][O:18][CH2:17][CH2:16]2)[N:3]=1

Participants

7

Reactant 5

HCID 176Acetic AcidHCID 9005Trimethyl orthoformateHCID 5049666Sodium triacetoxyborohydrideHCID 156491744-Methylpiperidin-4-olHCID 59605819(2-chloro-9-methyl-6-morpholin-4-yl-9H-purin-8-yl)acetaldehyde

Product 1

HCID 596059071-[2-(2-Chloro-9-methyl-6-morpholin-4-yl-9H-purin-8-yl)ethyl]-4-methylpiperidin-4-olYield 17%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

To a solution of (2-chloro-9-methyl-6-morpholin-4-yl-9H-purin-8-yl)acetaldehyde (200 mg, 0.68 mmol) in DCE (15 mL) was added 4-methylpiperidin-4-ol (117 mg, 1.01 mmol), trimethyl orthoformate (0.74 mL, 6.76 mmol) and acetic acid (0.04 mL, 0.68 mmol). The reaction mixture was stirred at room temperature for 1.5 h, sodium triacetoxyborohydride (187 mg, 1.35 mmol) was added and the resulting mixture stirred for a further 18 h. The reaction mixture was loaded onto an Isolute® SCX-2 cartridge, washed with MeOH then the desired product eluted with 2 M NH3/MeOH in DCM. The resulting residue was purified by column chromatography (Si—PCC, 0-20% 2 M NH3/MeOH in DCM) to give the title compound as a colourless oil (45 mg, 17%). LCMS (Method H): RT=2.24 min, [M+H]+ 395.5

Workup

  1. stirringthe resulting mixture stirred for a further 18 h
  2. washwashed with MeOH
  3. washthe desired product eluted with 2 M NH3/MeOH in DCM
  4. customThe resulting residue was purified by column chromatography (Si—PCC, 0-20% 2 M NH3/MeOH in DCM)

Sources & evidence

ORD record
ord-5ead96060361431491560dab1ae49695
Source dataset
uspto-grants-2013_03
Patent number
US08394796B2

Reaction notes

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