1,1'-Carbonyldiimidazole → HCID 178440585, compound

HRID 1577369Notes

Reaction equation

[CH2:1]([C:5]1[S:21][C:8]2[N:9]=[C:10]3[CH:17]=[CH:16][C:15]([C:18]([OH:20])=O)=[CH:14][N:11]3[C:12](=[O:13])[C:7]=2[CH:6]=1)[CH2:2][CH2:3][CH3:4].C(N1C=CN=C1)(N1C=CN=C1)=O.O.[NH2:35][C:36]1[NH:40][N:39]=[N:38][N:37]=1>CN(C)C=O>[CH2:1]([C:5]1[S:21][C:8]2[N:9]=[C:10]3[CH:17]=[CH:16][C:15]([C:18]([NH:35][C:36]4[NH:40][N:39]=[N:38][N:37]=4)=[O:20])=[CH:14][N:11]3[C:12](=[O:13])[C:7]=2[CH:6]=1)[CH2:2][CH2:3][CH3:4]

Participants

Conditions

Temperature: 105 °C

Procedure

1.6 g (0.0053 mol) of 2-butyl-4-oxo-4H-pyrido[1,2-a]thieno[2,3-d]-pyrimidine-7-carboxylic acid (Example 4) and 1.75 g (0.0108 mol) of 1,1' carbonyldiimidazole (Aldrich Chemical Company) in 50 ml of dimethylformamide are stirred under a nitrogen atmosphere at 105° C. for seventy minutes. The mixture is allowed to stand at room temperature for thirty minutes and then 0.545 g (0.00529 mol) of 5-aminotetrazole monohydrate (Aldrich Chemical Company) is added and the mixture heated at 105° C. for one hundred minutes. The solvent is evaporated and the residue is dissolved in dimethylformamide and filtered. The filtrate is cooled and 1.1 g of 2-butyl-4-oxo-N-1H-tetrazol-5-yl-4H-pyrido[1,2-a]thieno[2,3-d]-pyrimidine-7-carboxamide is collected; mp 290° (dec).

Workup

waitto stand at room temperature for thirty minutes
customThe solvent is evaporated
dissolutionthe residue is dissolved in dimethylformamide
filtrationfiltered
temperatureThe filtrate is cooled
custom1.1 g of 2-butyl-4-oxo-N-1H-tetrazol-5-yl-4H-pyrido[1,2-a]thieno[2,3-d]-pyrimidine-7-carboxamide is collected

Sources & evidence

ORD record: ord-3d29c40740f8484780bab6d5aab2b059
Source dataset: uspto-grants-1981_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04287340

Reaction notes

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