Trimethyl orthoformate → 4-(2-Chloro-6-((4-(methylsulfonyl)piperazin-1-yl)methyl)thieno[3,2-d]pyrimidin-4-yl)morpholine

HRID 881219Notes

Reaction equation

HRID 881219 reaction equation
[Cl:1][C:2]1[N:3]=[C:4]([N:13]2[CH2:18][CH2:17][O:16][CH2:15][CH2:14]2)[C:5]2[S:10][C:9]([CH:11]=O)=[CH:8][C:6]=2[N:7]=1.[CH3:19][S:20]([N:23]1[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]1)(=[O:22])=[O:21].COC(OC)OC.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl>[Cl:1][C:2]1[N:3]=[C:4]([N:13]2[CH2:18][CH2:17][O:16][CH2:15][CH2:14]2)[C:5]2[S:10][C:9]([CH2:11][N:26]3[CH2:27][CH2:28][N:23]([S:20]([CH3:19])(=[O:22])=[O:21])[CH2:24][CH2:25]3)=[CH:8][C:6]=2[N:7]=1

Participants

6

Reactant 4

HCID 9005Trimethyl orthoformateHCID 7091611-(Methylsulfonyl)piperazineHCID 5049666Sodium triacetoxyborohydrideHCID 457899852-Chloro-4-morpholinothieno[3,2-d]pyrimidine-6-carbaldehyde

Product 1

HCID 236508374-(2-Chloro-6-((4-(methylsulfonyl)piperazin-1-yl)methyl)thieno[3,2-d]pyrimidin-4-yl)morpholineYield 66.3%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

For example, N—BOC-piperazine and methanesulfonyl chloride were reacted together in dichloromethane and triethylamine to yield 4-methanesulfonyl-piperazine-1-carboxylic acid tert-butyl ester. Cleavage of the BOC protecting group using HCl (2M) in dichloromethane yielded 1-methanesulfonyl-piperazine. HCl salt. A mixture of 2-chloro-4-morpholin-4-yl-thieno[3,2-d]pyrimidine-6-carbaldehyde 10 (1.00 g), 1-methanesulfonyl-piperazine (750 mg) and trimethylorthoformate (3.80 mL) was stirred in 1,2-dichloroethane (30 mL) for 6 hrs at room temperature. To this was added sodium triacetoxyborohydride (900 mg) and the reaction mixture was stirred for 24 hours at room temperature. The mixture was then quenched with brine, extracted with dichloromethane, dried (MgSO4) and the solvent removed in vacuo. The residue was triturated with hot ethyl acetate to yield 2-chloro-6-((4-methylsulfonylpiperazin-1-yl)methyl)-4-morpholinothieno[3,2-d]pyrimidine as a white solid (1.01 g).

Workup

  1. customThe mixture was then quenched with brine
  2. extractionextracted with dichloromethane
  3. dry with materialdried (MgSO4)
  4. customthe solvent removed in vacuo
  5. customThe residue was triturated with hot ethyl acetate

Sources & evidence

ORD record
ord-83e2daf8c0264829ab977b5f35eb44d1
Source dataset
uspto-grants-2015_03
Patent number
US08993563B2

Reaction notes

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