Hydrochloric Acid → 56393-23-8

HRID 482794Notes

Reaction equation

HRID 482794 reaction equation
[CH2:1]([N:3]([CH2:31][CH:32]([OH:34])[CH3:33])[C:4]1[N:5]=[N:6][C:7]([NH:10][NH:11]C(C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=[CH:8][CH:9]=1)[CH3:2].[ClH:35]>C(O)C>[ClH:35].[ClH:35].[CH2:1]([N:3]([CH2:31][CH:32]([OH:34])[CH3:33])[C:4]1[N:5]=[N:6][C:7]([NH:10][NH2:11])=[CH:8][CH:9]=1)[CH3:2]

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 20223644HCID 20223644, compound

Product 1

HCID 304396556393-23-8

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

To a 50% suspension of 1.5 g sodium hydride in 100 ml tetrahydrofuran, 3 g ethyl-(2-hydroxypropyl)amine are added; this is stirred at room temperature for 30 minutes, thereafter 4.5 g of 3-chloro-6-triphenylmethylazopyridazine are added. Stirring is maintained for 5 minutes, the organic phase is washed with a saturated solution of sodium chloride, rendered anhydrous and evaporated to dryness under a vacuum. The residue is taken up with ethyl alcohol, diluted with water, and the precipitate is collected under a vacuum which is then triturated with diisopropyl ether to yield 4 g of 3-[ethyl-(2-hydroxypropyl)amino]-6-triphenylmethylazopyridazine melting at 137° C. (with decomposition). A solution of 3 g of 3-[ethyl-(2-hydroxypropyl)amino]-6-triphenylmethylazopyridazine in 300 ml ethyl alcohol and 50 ml tetrahydrofuran containing 300 mg 5% palladium on carbon is hydrogenated at room temperature and pressure. The catalyst is filtered out, then the residue is evaporated and triturated with diethyl ether to yield 2.5 g of 3-[ethyl-(2-hydroxypropyl)amino]-6-(2-triphenylmethylhydrazino)pyridazine melting at 122° C. (with decomposition). A solution of 2 g of 3-[ethyl-(2-hydroxypropyl)amino]-6-(2-triphenylmethylhydrazino)pyridazine in 100 ml absolute ethyl alcohol is mixed with 2.5 ml concentrated hydrochloric acid and stirred for 15 minutes at room temperature. This is evaporated under a vacuum and the residue taken up with isopropyl alcohol. This is diluted with diisopropyl ether to yield 1.2 g of 3-[ethyl-(2-hydroxypropyl)amino]-6-hydrazinopyridazine dihydrochloride melting at 208°-212° C. (with decomposition).

Workup

  1. customThis is evaporated under a vacuum
  2. additionThis is diluted with diisopropyl ether

Sources & evidence

ORD record
ord-f8a52c12237448d983c8c97026ac9a46
Source dataset
uspto-grants-1986_03
Patent number
US04575552

Reaction notes

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