6-Formyl-4-isopropoxy-[1,5]naphthyridine-3-carbonitrile → HCID 178458708, compound

HRID 968716Notes

Reaction equation

HRID 968716 reaction equation
[Cl:1][C:2]1[CH:15]=[CH:14][CH:13]=[CH:12][C:3]=1[CH2:4][NH:5][C:6]1[S:7][CH2:8][C:9](=[O:11])[N:10]=1.C(O[Na])(C)=O.[CH:21]([C:23]1[N:24]=[C:25]2[C:30](=[CH:31][CH:32]=1)[N:29]=[CH:28][C:27]([C:33]#[N:34])=[C:26]2[O:35][CH:36]([CH3:38])[CH3:37])=O>CC(O)=O>[Cl:1][C:2]1[CH:15]=[CH:14][CH:13]=[CH:12][C:3]=1[CH2:4][NH:5][C:6]1[S:7][C:8](=[CH:21][C:23]2[N:24]=[C:25]3[C:30](=[CH:31][CH:32]=2)[N:29]=[CH:28][C:27]([C:33]#[N:34])=[C:26]3[O:35][CH:36]([CH3:38])[CH3:37])[C:9](=[O:11])[N:10]=1

Participants

5

Reactant 3

HCID 587243116-Formyl-4-isopropoxy-[1,5]naphthyridine-3-carbonitrileHCID 178418247HCID 178418247, compoundHCID 178516939HCID 178516939, compound

Product 1

HCID 178458708HCID 178458708, compoundYield 35.3%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Conditions

Temperature
90 °C

Procedure

To a mixture of 2-(2-chloro-benzylamino)-thiazol-4-one (48.1 mg, 0.20 mmol) (prepared as described below), AcONa (160 mg, 1.95 mmol), molecular sieves, and 6-formyl-4-isopropoxy-[1,5]naphthyridine-3-carbonitrile (53.1 mg, 0.22 mmol, (see Example 1) in a sealed tube was added AcOH (0.3 mL). The reaction mixture was heated to 85-95° C. (oil bath) for 1.5 h. The reaction mixture was then cooled to r.t. and triturated with water. The solid was collected by filtration and washed with water. The solid was then suspended in hot MeOH (50 mL) and filtered again. The filtrate was concentrated to give a brown solid: 120.3 mg, which was purified by Biotage flash column (1%-6% MeOH in CH2Cl2) to give 6-[2-(2-chloro-benzylamino)-4-oxo-4H-thiazol-5-ylidenemethyl]-4-isopropoxy-[1,5]naphthyridine-3-carbonitrile as a yellowish solid (32.8 mg, 35.3%). HR-ES (+) m/e calcd for C23H18ClN5O2S (M+H)+ 464.0943. found 464.0943.

Workup

  1. temperatureThe reaction mixture was then cooled to r.t.
  2. customtriturated with water
  3. filtrationThe solid was collected by filtration
  4. washwashed with water
  5. filtrationfiltered again
  6. concentrationThe filtrate was concentrated
  7. customto give a brown solid
  8. custom120.3 mg, which was purified by Biotage flash column (1%-6% MeOH in CH2Cl2)

Sources & evidence

ORD record
ord-eb66941ec13442abb2a65e69639bf8ea
Source dataset
uspto-grants-2007_12
Patent number
US07304074B2

Reaction notes

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