Hydrazine → HCID 54228347, compound

HRID 1242053Notes

Reaction equation

HRID 1242053 reaction equation
[C:1]([O:5][C:6]([C:8]1[C:16]2[CH2:15][CH:14]([CH2:17][N:18]3C(=O)C4C(=CC=CC=4)C3=O)[O:13][CH2:12][C:11]=2[S:10][C:9]=1[NH2:29])=[O:7])([CH3:4])([CH3:3])[CH3:2].NN>C(O)C.ClCCl>[C:1]([O:5][C:6]([C:8]1[C:16]2[CH2:15][CH:14]([CH2:17][NH2:18])[O:13][CH2:12][C:11]=2[S:10][C:9]=1[NH2:29])=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 2

HCID 9321HydrazineHCID 22084100HCID 22084100, compound

Product 1

HCID 54228347HCID 54228347, compoundYield 87.9%

Reagents, catalysts & solvents 2

HCID 702EthanolSolvent2×HCID 6344DichloromethaneSolvent

Conditions

Temperature
80 °C

Procedure

In a 50-ml round-bottom flask, a suspension of 2-amino-5-(1,3-dioxo-1,3-dihydro-isoindol-2-ylmethyl)-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester (2.00 g, 4.8 mmol) in absolute ethanol (20 ml) was flushed with nitrogen and sealed with a rubber septum. Hydrazine (0.5 ml, 15.9 mmol) was added, followed by an additional portion of absolute ethanol (20 ml) at room temperature. The reaction mixture was heated to 80° C. for 3.5 h., then allowed to stir at room temperature for 14 h. The precipitate was filtered off and washed with absolute ethanol. The filtrate was concentrated in vacuo leaving an oil, which was dissolved in dichloromethane (30 ml) and refiltered. The solvent was evaporated in vacuo affording 1.2 g (86%) of 2-amino-5-aminomethyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid tert-butyl ester as a solid.

Workup

  1. customwas flushed with nitrogen
  2. customsealed with a rubber septum
  3. filtrationThe precipitate was filtered off
  4. washwashed with absolute ethanol
  5. concentrationThe filtrate was concentrated in vacuo
  6. customleaving an oil, which
  7. customThe solvent was evaporated in vacuo

Sources & evidence

ORD record
ord-43e82281d3764685bc1cb401c8f829c2
Source dataset
uspto-grants-2006_10
Patent number
US07115624B1

Reaction notes

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