Triethylamine → 4-Phenylbutyl 2-[benzylsulfonyl]-perhydropyridazinecarboxylate

HRID 851941Notes

Reaction equation

HRID 851941 reaction equation
[C:1]1([CH2:7][S:8](Cl)(=[O:10])=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[NH:12]1[CH2:17][CH2:16][CH2:15][CH:14]([C:18]([O:20][CH2:21][CH2:22][CH2:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)=[O:19])[NH:13]1.C(N(CC)CC)C>C(Cl)Cl>[CH2:7]([S:8]([N:13]1[CH:14]([C:18]([O:20][CH2:21][CH2:22][CH2:23][CH2:24][C:25]2[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=2)=[O:19])[CH2:15][CH2:16][CH2:17][NH:12]1)(=[O:10])=[O:9])[C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 74740Phenylmethanesulfonyl chlorideHCID 184700714-Phenylbutyl perhydropyridazinecarboxylate

Product 1

HCID 184700884-Phenylbutyl 2-[benzylsulfonyl]-perhydropyridazinecarboxylateYield 64.6%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Procedure

A solution of α-toluene sulfonyl chloride (1.12 g, 5.77 mmol) in CH2Cl2 was added to a CH2Cl2 solution containing 4-phenylbutyl perhydropyridazinecarboxylate (1.37 g, 5.2 mmol) and triethylamine (0.83 ml, 6 mmol). The reaction was stirred overnight at room temperature under nitrogen atmosphere, and then diluted to 50 ml CH2Cl2. The organic layer was washed with water, dried, and concentrated. The crude material was purified by silica gel column to yield 1.4 g (64%) final product as clear oil. Rf=0.60 (2:1 hexane:EtOAc). 1H NMR (CDCl3, 400 MHz): δ 1.68 (m, 8H); 2.67 (m, 2H); 2.90 (m, 1H); 3.38 (m, 2H); 4.22 (m, 5H); 7.32 (m, 10H). Anal. Calcd. for C22H28N2S1O4: C, 63.44; H, 6.78; N, 6.73, S, 7.70. Found: C, 63.86; H, 6.83; N, 6.41, S, 7.58.

Workup

  1. washThe organic layer was washed with water
  2. customdried
  3. concentrationconcentrated
  4. customThe crude material was purified by silica gel column

Sources & evidence

ORD record
ord-0f0075878d534f4a9f0888e44873c657
Source dataset
uspto-grants-2007_08
Patent number
US07253169B2

Reaction notes

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