Methyl iodide → HCID 131712642, compound

HRID 1759573Notes

Reaction equation

[C:1]1(/[CH:7]=[CH:8]/[C:9]2[N:10]=[C:11]3[CH:20]=[CH:19][C:18]4([CH2:24][CH:17]4[N:12]3[C:13](=[O:16])[C:14]=2[CH3:15])[C:21]([OH:23])=[O:22])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.CI.[C:27]([O-])([O-])=O.[K+].[K+]>>[C:1]1(/[CH:7]=[CH:8]/[C:9]2[N:10]=[C:11]3[CH:20]=[CH:19][C:18]4([CH2:24][CH:17]4[N:12]3[C:13](=[O:16])[C:14]=2[CH3:15])[C:21]([O:23][CH3:27])=[O:22])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

Reactant 3

HCID 6328Methyl iodide

HCID 11430Potassium Carbonate

HCID 70547666HCID 70547666, compound

Product 1

HCID 131712642HCID 131712642, compoundYield 59.9%

Procedure

2-trans-(2-phenyl-ethenyl)-3-methyl-6,7-methylen-4-oxo-4H-pyrido[1,2-a]pyrimidine-7-carboxylic acid (0.8 g) was reacted with methyl iodide (0.55 g) and anhydrous K2CO3 (0.65 g) in dmethylformamide (7 ml) under stirring at room temperature for 4 hours. After dilution with ice water the precipitate was filtered off: crystallization from acetone gave 0.5 g of 2-trans-(2-phenyl-ethenyl)-3-methyl-6,7-methylen-4-oxo-4H-pyrido[1,2-a]pyrimidine-7-carboxylic acid, methyl ester, m.p. 164°-165° C. By proceeding analogously the following compound were prepared:

Workup

filtrationAfter dilution with ice water the precipitate was filtered off
customcrystallization from acetone

Sources & evidence

ORD record: ord-d6de7b3843ff4aef83b5edeea3c1ef36
Source dataset: uspto-grants-1982_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04341780

Reaction notes

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