4-Aminopyridine → (+/-)-N-(4-pyridyl)-4-(4-chlorophenyl)-2,3,9-trimethyl-6H-thieno[3,2-f][1,2,4]triazolo-[4,3-a][1,4]diazepine-6-acetamide

HRID 727266Notes

Reaction equation

HRID 727266 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:14]3[C:15]([CH3:19])=[C:16]([CH3:18])[S:17][C:13]=3[N:12]3[C:20]([CH3:23])=[N:21][N:22]=[C:11]3[CH:10]([CH2:24][C:25]([OH:27])=O)[N:9]=2)=[CH:4][CH:3]=1.C(N(CC)CC)C.C(Cl)(=O)C(C)(C)C.[NH2:42][C:43]1[CH:48]=[CH:47][N:46]=[CH:45][CH:44]=1>CN(C)C=O.O1CCCC1.O>[N:46]1[CH:47]=[CH:48][C:43]([NH:42][C:25](=[O:27])[CH2:24][CH:10]2[N:9]=[C:8]([C:5]3[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][CH:6]=3)[C:14]3[C:15]([CH3:19])=[C:16]([CH3:18])[S:17][C:13]=3[N:12]3[C:20]([CH3:23])=[N:21][N:22]=[C:11]23)=[CH:44][CH:45]=1

Participants

8

Reactant 4

HCID 17274-AminopyridineHCID 8471TriethylamineHCID 62493Pivaloyl chlorideHCID 197049212-[7-(4-Chlorophenyl)-4,5,13-trimethyl-3-thia-1,8,11,12-tetraazatricyclo[8.3.0.0,2,6]trideca-2(6),4,7,10,12-pentaen-9-yl]acetic acid

Product 1

HCID 19704993(+/-)-N-(4-pyridyl)-4-(4-chlorophenyl)-2,3,9-trimethyl-6H-thieno[3,2-f][1,2,4]triazolo-[4,3-a][1,4]diazepine-6-acetamideYield 63.8%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×HCID 8028TetrahydrofuranSolvent2×

Conditions

Temperature
-5 °C

Procedure

(±)-4-(4-Chlorophenyl)-2,3,9-trimethyl-6H-thieno[3,2-f][1,2,4]triazolo[4,3-a][1,4]diazepine-6-acetic acid (1.7 g) and triethylamine (0.65 ml) are added to a mixed solvent of dimethylformamide (20 ml) and tetrahydrofuran (10 ml). The mixture is cooled to -5° C. and pivaloyl chloride (0.57 ml) is dropwise added at said temperature. Ten minutes later, a solution of 4-aminopyridine (0.43 g) in dimethylformamide (2 ml) and tetrahydrofuran (2 ml) is dropwise added at said temperature, and the mixture is stirred at room temperature for 2 hours. Water is added to the reaction mixture, and the mixture is extracted with ethyl acetate, washed with water and dried over anhydrous magnesium sulfate. The solvent is distilled away and the residue is recrystallized from isopropyl alcohol/isopropyl ether to give 1.29 g of (±)-N-(4-pyridyl)-4-(4-chlorophenyl)-2,3,9-trimethyl-6H-thieno[3,2-f][1,2,4]triazolo-[4,3-a][1,4]diazepine-6-acetamide, melting point 237°-239° C.

Workup

  1. extractionthe mixture is extracted with ethyl acetate
  2. washwashed with water
  3. dry with materialdried over anhydrous magnesium sulfate
  4. distillationThe solvent is distilled away
  5. customthe residue is recrystallized from isopropyl alcohol/isopropyl ether

Sources & evidence

ORD record
ord-6d23f6f62548463c9f11e4f026aec421
Source dataset
uspto-grants-1998_01
Patent number
US05712274

Reaction notes

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