Sodium Carbonate → Racemic tert-Butyl 4-(6-benzyl-2-(2,6-dimethylphenyl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl)-(trans)-2,5-dimethylpiperazine-1-carboxylate

HRID 80786

Reaction equation

HRID 80786 reaction equation
[CH2:1]([N:8]1[CH2:33][CH2:32][C:11]2[N:12]=[C:13](Cl)[N:14]=[C:15]([N:16]3[C@H:21]([CH3:22])[CH2:20][N:19]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[C@@H:18]([CH3:30])[CH2:17]3)[C:10]=2[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:34][C:35]1[CH:40]=[CH:39][CH:38]=[C:37]([CH3:41])[C:36]=1B(O)O.C(=O)([O-])[O-].[Na+].[Na+]>COCCOC.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>[CH2:1]([N:8]1[CH2:33][CH2:32][C:11]2[N:12]=[C:13]([C:36]3[C:37]([CH3:41])=[CH:38][CH:39]=[CH:40][C:35]=3[CH3:34])[N:14]=[C:15]([N:16]3[C@H:21]([CH3:22])[CH2:20][N:19]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[C@@H:18]([CH3:30])[CH2:17]3)[C:10]=2[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 5833222,6-Dimethylphenylboronic acidHCID 89400111Racemic tert-butyl 4-(6-benzyl-2-chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl)-(trans)-2,5-dimethylpiperazine-1-carboxylate

Product 1

HCID 71244696Racemic tert-Butyl 4-(6-benzyl-2-(2,6-dimethylphenyl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl)-(trans)-2,5-dimethylpiperazine-1-carboxylate

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
140 °C

Procedure

To a solution of racemic tert-butyl 4-(6-benzyl-2-chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl)-(trans)-2,5-dimethylpiperazine-1-carboxylate (0.54 g, 1.14 mmol) in DME (9 mL) was added 2,6-dimethylphenylboronic acid (0.257 g, 1.72 mmol), Pd(Ph3P)4 (0.198 g, 0.172 mmol) and a 2 M aq solution of sodium carbonate (1.9 mL). The reaction was heated at 140° C. in a microwave reactor for 1.75 h. The reaction was filtered and diluted with EtOAc and brine. The organic layer was separated and then dried (Na2SO4), filtered and concentrated. The residue was then purified by FCC (55-80% EtOAc/heptane) to give the title compound. MS (ESI+) m/z 542.5 (M+H)+.

Workup

  1. filtrationThe reaction was filtered
  2. additiondiluted with EtOAc and brine
  3. customThe organic layer was separated
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was then purified by FCC (55-80% EtOAc/heptane)

Sources & evidence

ORD record
ord-299759047ca24b6ab110fc1ebad8cdad
Source dataset
uspto-grants-2014_09
Patent number
US08846656B2

Linked notes

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