Carbon Dioxide → 6-Chloro-4-(6-(4-methylpiperazin-1-ylmethyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-benzimidazol-2-yl]-2-(2-trimethylsilanylethoxymethyl)-2H-pyridazin-3-one

HRID 12281Notes

Reaction equation

HRID 12281 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:17]2[N:21]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:29])([CH3:28])[CH3:27])[C:20]3[CH:30]=[C:31](C=O)[CH:32]=[CH:33][C:19]=3[N:18]=2)[C:5](=[O:16])[N:6]([CH2:8][O:9][CH2:10][CH2:11][Si:12]([CH3:15])([CH3:14])[CH3:13])[N:7]=1.[CH3:36][N:37]1[CH2:42][CH2:41][NH:40][CH2:39][CH2:38]1.[C:43](O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C([O-])(O)=O.[Na+].C(=O)=O>ClCCl.C(O)(=O)C>[Cl:1][C:2]1[CH:3]=[C:4]([C:17]2[N:21]([CH2:22][O:23][CH2:24][CH2:25][Si:26]([CH3:28])([CH3:27])[CH3:29])[C:20]3[CH:30]=[C:31]([CH2:36][N:37]4[CH2:42][CH2:41][N:40]([CH3:43])[CH2:39][CH2:38]4)[CH:32]=[CH:33][C:19]=3[N:18]=2)[C:5](=[O:16])[N:6]([CH2:8][O:9][CH2:10][CH2:11][Si:12]([CH3:14])([CH3:15])[CH3:13])[N:7]=1

Participants

8

Reactant 5

HCID 280Carbon DioxideHCID 531671-MethylpiperazineHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 866116086-Chloro-4-(6-formyl-1-(2-trimethylsilanylethoxymethyl)-1H-benzimidazol-2-yl]-2-(2-trimethylsilanylethoxymethyl)-2H-pyridazin-3-one

Product 1

HCID 686821596-Chloro-4-(6-(4-methylpiperazin-1-ylmethyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-benzimidazol-2-yl]-2-(2-trimethylsilanylethoxymethyl)-2H-pyridazin-3-one

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 6344DichloromethaneSolvent2×

Procedure

6-Chloro-4-(6-formyl-1-(2-trimethylsilanylethoxymethyl)-1H-benzimidazol-2-yl]-2-(2-trimethylsilanylethoxymethyl)-2H-pyridazin-3-one is dissolved in dichloro-methane. 4-Methylpiperazine and acetic acid are added. After 15 minutes, sodium triacetoxyborohydride is added in several portions over the course of 3 hours. After conversion is complete, saturated aqueous NaHCO3 solution is added and the reaction solution is stirred until no further CO2 evolution is observed. It is diluted with dichloromethane, and the aqueous phase is extracted with dichloromethane. The combined organic phases are dried with MgSO4, and the solvent is removed in a rotary evaporator.

Workup

  1. extractionthe aqueous phase is extracted with dichloromethane
  2. dry with materialThe combined organic phases are dried with MgSO4
  3. customthe solvent is removed in a rotary evaporator

Sources & evidence

ORD record
ord-e36806988f24499e97201003b5c7807a
Source dataset
uspto-grants-2010_06
Patent number
US07727989B2

Reaction notes

Loading…