Isopropanol → (+/-)-(3SR,3aRS)-isopropyl 2-(3-chloro-4-cyanophenyl)-3-cyclopentyl-3,3a,4,5-tetrahydro-2H-benzo[g]indazole-7-carboxylate

HRID 505756Notes

Reaction equation

[Cl:1][C:2]1[CH:3]=[C:4]([N:10]2[CH:18]([CH:19]3[CH2:23][CH2:22][CH2:21][CH2:20]3)[CH:17]3[C:12]([C:13]4[CH:27]=[CH:26][C:25]([C:28]([OH:30])=[O:29])=[CH:24][C:14]=4[CH2:15][CH2:16]3)=[N:11]2)[CH:5]=[CH:6][C:7]=1[C:8]#[N:9].[CH3:31][CH:32](O)[CH3:33]>>[Cl:1][C:2]1[CH:3]=[C:4]([N:10]2[CH:18]([CH:19]3[CH2:20][CH2:21][CH2:22][CH2:23]3)[CH:17]3[C:12]([C:13]4[CH:27]=[CH:26][C:25]([C:28]([O:30][CH:32]([CH3:33])[CH3:31])=[O:29])=[CH:24][C:14]=4[CH2:15][CH2:16]3)=[N:11]2)[CH:5]=[CH:6][C:7]=1[C:8]#[N:9]

Participants

Reactant 2

HCID 3776Isopropanol

HCID 24983760(+/-)(3SR,3aRS)-2-(3-chloro-4-cyanophenyl)-3-cyclopentyl-3,3a,4,5-tetrahydro-2H-benzo[g]indazole-7-carboxylic acid

Product 1

HCID 67996386(+/-)-(3SR,3aRS)-isopropyl 2-(3-chloro-4-cyanophenyl)-3-cyclopentyl-3,3a,4,5-tetrahydro-2H-benzo[g]indazole-7-carboxylateYield 66%

Procedure

The title compound was prepared from (±)-(3SR,3aRS)-2-(3-chloro-4-cyanophenyl)-3-cyclopentyl-3,3a,4,5-tetrahydro-2H-benzo[g]indazole-7-carboxylic acid, Example 15 and propan-2-ol according to Method E (yellow solid, 145 mg, 0.313 mmol, 66% yield). 1H NMR (400 MHz, CDCl3) δ ppm 8.14 (d, J=8.1 Hz, 1H), 7.89-7.94 (m, 2H), 7.46 (d, J=8.9 Hz, 1H), 7.30 (d, J=2.1 Hz, 1H), 7.03 (dd, J=8.9, 2.1 Hz, 1H), 5.22-5.32 (m, 1H), 4.63 (dd, J=9.7, 5.4 Hz, 1H), 3.44-3.54 (m, 1H), 3.08-3.16 (m, 1H), 2.86-2.98 (m, 1, 2.25-2.36 (m, 1H), 2.07-2.19 (m, 1H), 1.88-2.03 (m, 1H), 1.73-1.83 (m, 1H), 1.42-1.66 (m, 5H), 1.39 (d, J=6.4 Hz, 6H), 1.20-1.37 (m, 2H). ES-HRMS m/z calc. for C27H29ClN3O2 (M+H) 462.1943, found 462.1897.

Sources & evidence

ORD record: ord-a9fbab2367c441c0a81a11b3c10c4016
Source dataset: uspto-grants-2010_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07781428B2

Reaction notes

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