3-Hydroxy-2-naphthoic acid hydrazide → 3-Hydroxy-2-naphthoic (2,3-dihydroxy-1-naphthylmethylene) hydrazide

HRID 976059Notes

Reaction equation

HRID 976059 reaction equation
[OH:1][C:2]1[C:11]([OH:12])=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]=1[CH:13]=O.[OH:15][C:16]1[C:17]([C:26]([NH:28][NH2:29])=[O:27])=[CH:18][C:19]2[C:24]([CH:25]=1)=[CH:23][CH:22]=[CH:21][CH:20]=2>>[OH:1][C:2]1[C:11]([OH:12])=[CH:10][C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]=1[CH:13]=[N:29][NH:28][C:26]([C:17]1[C:16]([OH:15])=[CH:25][C:24]2[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=2)[CH:18]=1)=[O:27]

Participants

3

Reactant 2

HCID 726993-Hydroxy-2-naphthoic acid hydrazideHCID 133438102,3-Dihydroxy-1-naphthaldehyde

Product 1

HCID 1363810763-Hydroxy-2-naphthoic (2,3-dihydroxy-1-naphthylmethylene) hydrazideYield 18%

Procedure

Following the general procedure of Example 1, condensation of 2, 3-dihydroxy-1-naphthaldehyde and 3-hydroxy-2-naphthoic hydrazide yielded a yellow crystal (18%) [recrystallized from dioxane/H2O (1:1, v/v)]: mp>285° C.; 1H NMR d 13.16 (br s, 1 H), 12.27 (br s, 1 H), 11.30 (br s, 1 H), 9.74 (br s, 1 H), 9.57 (s, 1 H), 8.53 (s, 1 H), 8.17 (d, 1 H, J=8.2 Hz), 7.95 (d, 1 H, J=8.2 Hz), 7.79 (d, 1 H, J=8.0 Hz), 7.70 (d, 1 H, J=7.7 Hz), 7.54 (t, 1 H, J=7.4 Hz), 7.42-7.25 (m, 5 H); HRMS Calcd for C22H16N2O4 :372.1110, found 372.1103; Anal. (C22H16N2O4H2O) C, H, N.

Sources & evidence

ORD record
ord-83a5492faaa64fab88f6642b416e8aee
Source dataset
uspto-grants-1997_03
Patent number
US05610192

Reaction notes

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