Hydrochloric Acid → HCID 178471168, compound

HRID 2392567Notes

Reaction equation

HRID 2392567 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[C:11](=[O:12])[C:10]([CH:13]=[CH:14][C:15]([O:17][CH2:18][CH3:19])=[O:16])=[C:9]([O:20]C)[C:8](=[O:22])[NH:7][C:6]=2[CH:23]=1.O.[OH-].[Li+].Cl>O1CCCC1.O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[C:11](=[O:12])[C:10](/[CH:13]=[CH:14]/[C:15]([O:17][CH2:18][CH3:19])=[O:16])=[C:9]([OH:20])[C:8](=[O:22])[NH:7][C:6]=2[CH:23]=1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 168937Lithium hydroxide, monohydrateHCID 541837368-Chloro-4-[2-(ethoxycarbonyl)ethenyl]-3-methoxy-2,5-dioxo-2,5-dihydro-1H-benz[b]azepine

Product 1

HCID 178471168HCID 178471168, compoundYield 83.1%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

A solution of 8-Chloro-4-[2-(ethoxycarbonyl)ethenyl]-3-methoxy-2,5-dioxo-2,5-dihydro-1H-benz[b]azepine (0.1009 g) in tetrahydrofuran (2.3 mL) was treated with a solution of lithium hydroxide monohydrate (0.0126 g) in tetrahydrofuran (2.3 mL) and water (0.5 mL) at room temperature. The solution was stirred at room temperature under argon for 68 hours. It was then added to 0.05N hydrochloric acid (10 mL). The resulting solid was filtered off, washed with water, and air-dried to give a light tan solid (0.0803 g). The solid was dissolved in hot ethanol (5 mL). The solution was filtered and treated with water (2 mL). The crystals were filtered off at room temperature, washed with aqueous ethanol (1:1, v:v) and dried under vacuum to give a light tan solid (0.054 g); mp 177.5°-178.4° C.; 1H NMR (d6 -DMSO) 7.74 (d,1, J=16), 6.74 (d,1, J=16) for trans olefin protons; MS: m/z=276 (base peak), 322 (M+1). Analysis for C15 H12ClNO5 : Calculated: C, 56.00; H, 3.78; N, 3.99; Found: C, 56.55; H, 3.78; N, 3.99.

Workup

  1. filtrationThe resulting solid was filtered off
  2. washwashed with water
  3. customair-dried

Sources & evidence

ORD record
ord-196cda50142b435e8860fdf43366318c
Source dataset
uspto-grants-1998_09
Patent number
US05801168

Reaction notes

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