3-Butyn-1-OL → HCID 10178842, compound

HRID 1168187Notes

Reaction equation

HRID 1168187 reaction equation
[Cl:1][C:2]1[CH:24]=[CH:23][C:5]([CH2:6][NH:7][C:8]([C:10]2[C:19](=[O:20])[C:18]3[C:13](=[CH:14][CH:15]=[C:16](I)[CH:17]=3)[N:12]([CH3:22])[N:11]=2)=[O:9])=[CH:4][CH:3]=1.[CH2:25]([OH:29])[CH2:26][C:27]#[CH:28]>C(NCC)C.[Cu](I)I.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[Cl:1][C:2]1[CH:24]=[CH:23][C:5]([CH2:6][NH:7][C:8]([C:10]2[C:19](=[O:20])[C:18]3[C:13](=[CH:14][CH:15]=[C:16]([C:28]#[C:27][CH2:26][CH2:25][OH:29])[CH:17]=3)[N:12]([CH3:22])[N:11]=2)=[O:9])=[CH:4][CH:3]=1

Participants

6

Reactant 2

HCID 135663-Butyn-1-OLHCID 9955567HCID 9955567, compound

Product 1

HCID 10178842HCID 10178842, compound

Reagents, catalysts & solvents 3

HCID 83717Copper iodideCatalystHCID 178418476HCID 178418476, compoundCatalystHCID 8021DiethylamineSolvent

Procedure

A solution of N-(4-chlorobenzyl)-6-iodo-1-methyl-4-oxo-1,4-dihydro-3-cinnolinecarboxamide [Example 1] (0.12 g), copper iodide (0.020 g), Pd(PPh3)2Cl2 (0.0067 g) and 3-butyn-1-ol (0.030 mL) in 10 mL diethylamine is stirred at room temperature for 18 h. The reaction is partitioned between ethyl acetate and H2O. The aqueous layer is extracted 3× with ethyl acetate. The organics are combined, dried over Na2SO4, filtered and concentrated. The residue is dissolved in CH2Cl2/MeOH and adsorbed onto silica. Purification by Biotage Flash 40S (eluent CH2Cl2 (1L), 1% MeOH/CH2Cl2 (1L), 2% MeOH/CH2Cl2 (1L), 3% MeOH/CH2Cl2 (1L)) affords the desired product which is recrystallized with CH2Cl2/hexanes (0.059 g, 56%). Physical characteristics are as follows: m.p. 227-229° C.; 1H NMR (300 MHz, DMSO-d6) δ9.90, 8.18, 7.93, 7.40, 4.97, 4.55, 4.24, 3.62, 2.62; IR (drift) 3238, 3176, 1671, 1614, 1594, 1551, 1493, 1470, 1411, 1321, 1281, 1045, 825, 808, 733 cm−1; MS (ESI) m/z 396.0 (M+H)+; HRMS (FAB) calcd for C21H18ClN3O3+H1 396.1115, found 396.1114.

Workup

  1. customThe reaction is partitioned between ethyl acetate and H2O
  2. extractionThe aqueous layer is extracted 3× with ethyl acetate
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. dissolutionThe residue is dissolved in CH2Cl2/MeOH
  7. customPurification by Biotage Flash 40S (eluent CH2Cl2 (1L), 1% MeOH/CH2Cl2 (1L), 2% MeOH/CH2Cl2 (1L), 3% MeOH/CH2Cl2 (1L))

Sources & evidence

ORD record
ord-53e380ae59954acea4b7b81957080fe9
Source dataset
uspto-grants-2003_09
Patent number
US06624160B2

Reaction notes

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