Hydrazinecarboxaldehyde → HCID 86757631, compound

HRID 2268098Notes

Reaction equation

HRID 2268098 reaction equation
[CH2:1]([O:3][C:4]1[CH:5]=[C:6]([CH:12]([N:17]2[CH2:25][C:24]3[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=3)[C:18]2=[O:26])[CH2:13][C:14]([OH:16])=[O:15])[CH:7]=[CH:8][C:9]=1[O:10][CH3:11])[CH3:2].C(N1C=CN=C1)(N1C=CN=C1)=O.[CH:39]([NH:41][NH2:42])=[O:40]>O1CCCC1>[CH2:1]([O:3][C:4]1[CH:5]=[C:6]([CH:12]([N:17]2[CH2:25][C:24]3[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=3)[C:18]2=[O:26])[CH2:13][C:14]2[O:16][CH:39]=[N:41][N:42]=2)[CH:7]=[CH:8][C:9]=1[O:10][CH3:11])[CH3:2].[C:39](=[N:41][NH:42][C:14](=[O:15])[CH2:13][CH:12]([C:6]1[CH:7]=[CH:8][C:9]([O:10][CH3:11])=[C:4]([O:3][CH2:1][CH3:2])[CH:5]=1)[N:17]1[CH2:25][C:24]2[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=2)[C:18]1=[O:26])=[O:40]

Participants

6

Reactant 3

HCID 12229HydrazinecarboxaldehydeHCID 682631,1'-CarbonyldiimidazoleHCID 183492403-(3-Ethoxy-4-methoxyphenyl)-3-(1-oxoisoindolinyl)propanoic acid

Product 2

HCID 18349246HCID 18349246, compoundHCID 86757631HCID 86757631, compoundYield 104.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

2-[1-(3-Ethoxy-4-methoxyphenyl)-2-(1,3,4-oxadiazol-2-yl)ethyl]isoindolin-1-one was prepared as described in Example 1. Reaction of 3-(3-ethoxy-4-methoxyphenyl)-3-(1-oxoisoindolin-2-yl)propanoic acid (1.50 g, 4.22 mmol), carbonyldiimidazole (0.80 g, 4.9 mmol) and formic hydrazide (310 mg, 5.16 mmol) in tetrahydrofuran (10 mL) yielded crude N-carbonylamino-3-(3-ethoxy-4-methoxyphenyl)-3-(1-oxoisoindolin-2-yl)propanamide (1.0 g, 2.2 mmol), which was then reacted with phosphorus pentoxide (2.32 g, 16.3 mmol) in chloroform (30 mL) at room temperature for 18 hours. The product was obtained as a white solid (250 mg, 16% overall yield): mp, 143.5-144.5° C.; 1H NMR (CDCl3); δ 1.43 (t, J=7.0 Hz, 3H, CH3), 3.65 (dd, J=6.1, 15.1 Hz, 1H, CHH), 3.85 (s, 3H, CH3), 3.87 (dd, J=9.9, 15.0 Hz, 1H, CHH), 4.01-4.12 (m, 3H, NCHH, CH2), 4.46 (d, J=16.6 Hz, 1H, NCHH), 5.99 (dd, J=6.1, 10.1 Hz, 1H, NCH), 6.83-6.87 (m, 1H, Ar), 6.94-7.01 (m, 2H, Ar), 7.34-7.52 (m, 3H, Ar), 7.78 (d, J=7.1 Hz,1H, Ar), 8.34 (s, 1H, NCH); 13C NMR (CDCl3) δ 14.60, 27.84, 46.19, 52.13, 55.86, 64.45, 111.32, 112.45, 118.98, 122.78, 123.72, 127.95, 129.95, 131.49, 131.98, 141.09, 148.66, 149.35, 153.31, 163.86, 168.25; Anal Calcd for C21H21N3O4+0.06 CH2Cl2: C, 65.79; H, 5.54; N, 10.93. Found: C, 65.87; H, 5.67; N, 10.89.

Sources & evidence

ORD record
ord-bee9ca607b4b4023ab49227d2394326a
Source dataset
uspto-grants-2001_12
Patent number
US06326388B1

Reaction notes

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