2-(3-Methoxy-allylidene)-malonic acid dimethyl ester → HCID 86649726, compound

HRID 384970

Reaction equation

[C@H:1]1([NH2:10])[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][CH2:2]1.CO[CH:13]=[CH:14][CH:15]=[C:16]([C:21]([O:23][CH3:24])=[O:22])[C:17]([O:19][CH3:20])=[O:18]>C1COCC1>[C@H:1]1([NH:10][CH:13]=[CH:14][CH:15]=[C:16]([C:17]([O:19][CH3:20])=[O:18])[C:21]([O:23][CH3:24])=[O:22])[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH2:3][CH2:2]1

Participants

Conditions

Temperature: 65 °C

Procedure

A 500 ml round-bottom flask was charged with 5.0 g (1.0 eq.) (R)-2,3-dihydro-1H-inden-1-amine and 7.5 g (1.0 eq.) dimethyl 2-(3-methoxyallylidene)malonate in 120 ml dry THF. The mixture was heated at 65° C. under N2 for 3 hrs. Then the solvent was removed in vacuo, and the crude mixture was purified by silica gel flash column chromatography to afford (R)-dimethyl 2-(3-(2,3-dihydro-1H-inden-1-ylamino)allylidene)malonate as a yellow solid (11.0 g) in 97% yield.

Workup

customThen the solvent was removed in vacuo
customthe crude mixture was purified by silica gel flash column chromatography

Sources & evidence

ORD record: ord-1d5205c8a5554bef9889ac4f906e5b8a
Source dataset: uspto-grants-2013_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08367836B2

Linked notes

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