Lawesson's reagent → 2-{[4-(2-Chlorophenyl)-3-ethoxycarbonyl-5-methoxycarbonyl-6-methyl-1,4-dihydropyridin-2-yl]methoxy}-thioacetamide

HRID 462461Notes

Reaction equation

HRID 462461 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH:8]1[C:13]([C:14]([O:16][CH3:17])=[O:15])=[C:12]([CH3:18])[NH:11][C:10]([CH2:19][O:20][CH2:21][C:22]([NH2:24])=O)=[C:9]1[C:25]([O:27][CH2:28][CH3:29])=[O:26].COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=[S:39])=CC=1>C(#N)C>[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH:8]1[C:13]([C:14]([O:16][CH3:17])=[O:15])=[C:12]([CH3:18])[NH:11][C:10]([CH2:19][O:20][CH2:21][C:22]([NH2:24])=[S:39])=[C:9]1[C:25]([O:27][CH2:28][CH3:29])=[O:26]

Participants

4

Reactant 2

HCID 87949Lawesson's reagentHCID 134572222-{[4-(2-Chlorophenyl)-3-ethoxycarbonyl-5-methoxycarbonyl-6-methyl-1,4-dihydropyridin-2-yl]methoxy}acetamide

Product 1

HCID 134572282-{[4-(2-Chlorophenyl)-3-ethoxycarbonyl-5-methoxycarbonyl-6-methyl-1,4-dihydropyridin-2-yl]methoxy}-thioacetamideYield 85%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

A mixture of 2-{[4-(2-chlorophenyl)-3-ethoxycarbonyl-5-methoxycarbonyl-6-methyl-1,4-dihydropyridin-2-yl]methoxy}-acetamide (6.8 g) and Lawesson's reagent (6.4 g) in acetonitrile (300 ml) was stirred at room temperature for 2.5 hours, filtered and evaporated. The residue was purified by chromatography on silica (80 g) using dichloromethane plus 0-10% v/v ethyl acetate as eluant. Appropriate fractions were combined and evaporated and the residual oil triturated with diethyl ether. The resulting solid was collected, washed with diethyl ether and dried to give the title compound (5.9 g), m.p. 149°-150° C.

Workup

  1. filtrationfiltered
  2. customevaporated
  3. customThe residue was purified by chromatography on silica (80 g)
  4. customevaporated
  5. customthe residual oil triturated with diethyl ether
  6. customThe resulting solid was collected
  7. washwashed with diethyl ether
  8. customdried

Sources & evidence

ORD record
ord-8006f3395f02413b84db1de3a037ab23
Source dataset
uspto-grants-1985_05
Patent number
US04515799

Reaction notes

Loading…