Triethylamine → 2-Methoxymethyl-1-[2-(3-pyridyl) thiazol-4-ylcarbonyl]-4-(3,4,5-trimethoxybenzoyl) piperazine

HRID 358787Notes

Reaction equation

HRID 358787 reaction equation
Cl.[CH3:2][O:3][CH2:4][CH:5]1[CH2:10][N:9]([C:11](=[O:24])[C:12]2[CH:17]=[C:16]([O:18][CH3:19])[C:15]([O:20][CH3:21])=[C:14]([O:22][CH3:23])[CH:13]=2)[CH2:8][CH2:7][NH:6]1.[N:25]1[CH:30]=[CH:29][CH:28]=[C:27]([C:31]2[S:32][CH:33]=[C:34]([C:36](O)=[O:37])[N:35]=2)[CH:26]=1.C(N(CC)CC)C.C(P(=O)(OCC)OCC)#N>CN(C)C=O>[CH3:2][O:3][CH2:4][CH:5]1[CH2:10][N:9]([C:11](=[O:24])[C:12]2[CH:13]=[C:14]([O:22][CH3:23])[C:15]([O:20][CH3:21])=[C:16]([O:18][CH3:19])[CH:17]=2)[CH2:8][CH2:7][N:6]1[C:36]([C:34]1[N:35]=[C:31]([C:27]2[CH:26]=[N:25][CH:30]=[CH:29][CH:28]=2)[S:32][CH:33]=1)=[O:37]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 76257Diethyl cyanophosphonateHCID 7365132-(3-Pyridyl)thiazole-4-carboxylic acidHCID 200666662-Methoxymethyl-4-(3,4,5trimethoxybenzoyl)piperazine hydrochloride

Product 1

HCID 541996132-Methoxymethyl-1-[2-(3-pyridyl) thiazol-4-ylcarbonyl]-4-(3,4,5-trimethoxybenzoyl) piperazine

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

To a mixture of 2-methoxymethyl-4-(3,4,5trimethoxybenzoyl)piperazine hydrochloride obtained in Reference Example 6 (0.52 g), 2-(3-pyridyl)thiazol-4-carboxylic acid (0.3 g), triethylamine (0.46 g) and N,N-dimethylformamide (3 ml) is added dropwise, while stirring under icecooling, diethyl cyanophosphonate (0.47 g). The reaction mixture is stirred at 0° C. for one hour, and then poured into ice-water, followed by extraction with ethyl acetate. The organic layer is washed with water, dried and concentrated under reduced pressure. The concentrate is purified by means of a silica gel column chromatography (eluent:AcOEt-CH2Cl2 --CH3OH=10:9:1) to give 2-methoxymethyl-1-[2-(3-pyridyl) thiazol-4-ylcarbonyl]-4-(3,4,5-trimethoxybenzoyl) piperazine. Recrystallization from ethanol gives colorless needles m.p. 149-150° C.

Workup

  1. additionis added dropwise
  2. extractionfollowed by extraction with ethyl acetate
  3. washThe organic layer is washed with water
  4. customdried
  5. concentrationconcentrated under reduced pressure
  6. customThe concentrate is purified by means of a silica gel column chromatography (eluent:AcOEt-CH2Cl2 --CH3OH=10:9:1)

Sources & evidence

ORD record
ord-47ba3f47be074ffcb2c99fc9a0fa8e5d
Source dataset
uspto-grants-1991_03
Patent number
US04997836

Reaction notes

Loading…