Hydrochloric Acid → 3,4-Dihydro-1H-isoquinoline-2-carboxylic Acid [4-(2-amino-ethoxy)-3-(2-methyl-2H-pyrazol-3-yl)-phenyl]-amide

HRID 521620Notes

Reaction equation

HRID 521620 reaction equation
O=C1CCC(=O)N1O[C:9]([NH:11][C:12]1[CH:28]=[CH:27][C:15]([O:16][CH2:17][CH2:18][NH:19]C(=O)OC(C)(C)C)=[C:14]([C:29]2[N:33]([CH3:34])[N:32]=[CH:31][CH:30]=2)[CH:13]=1)=[O:10].CN(C)C=O.[CH2:40]1[C:49]2[C:44](=[CH:45][CH:46]=[CH:47][CH:48]=2)[CH2:43][CH2:42][NH:41]1.Cl.CCOCC>Cl>[NH2:19][CH2:18][CH2:17][O:16][C:15]1[CH:27]=[CH:28][C:12]([NH:11][C:9]([N:41]2[CH2:42][CH2:43][C:44]3[C:49](=[CH:48][CH:47]=[CH:46][CH:45]=3)[CH2:40]2)=[O:10])=[CH:13][C:14]=1[C:29]1[N:33]([CH3:34])[N:32]=[CH:31][CH:30]=1

Participants

7

Reactant 5

HCID 313Hydrochloric AcidHCID 3283Diethyl EtherHCID 6228DimethylformamideHCID 70461,2,3,4-TetrahydroisoquinolineHCID 86633178tert-butyl {2-[4-({[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}amino)-2-(1-methyl-1H-pyrazol-5-yl)phenoxy]ethyl}carbamate

Product 1

HCID 578145663,4-Dihydro-1H-isoquinoline-2-carboxylic Acid [4-(2-amino-ethoxy)-3-(2-methyl-2H-pyrazol-3-yl)-phenyl]-amideYield 42.9%

Reagents, catalysts & solvents 1

HCID 313Hydrochloric AcidCatalyst

Procedure

A 2 mL aliquot of tert-butyl {2-[4-({[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}amino)-2-(1-methyl-1H-pyrazol-5-yl)phenoxy]ethyl}carbamate in dimethylformamide (60.0 μmol) was added to 1,2,3,4-tetrahydroisoquinoline (9.59 mg, 1.2 eq) and stirred at room temperature for 18 hr. To this was added 2.0M hydrochloric acid in ether (150 μL, 5 eq) and the reaction was stirred at room temperature for 60 hr. Some of the deprotections were incomplete so 2-3 drops of concentrated hydrochloric acid was added to these and they were stirred for another 24 hr. The ether and hydrochloric acid were evaporated under a stream of nitrogen and it was purified by HPLC. The proper fractions were collected and lyophilized to afford the title compound as a white solid in 42.9% yield. LCMS m/z (%)=392 (M+H, 100). 1H NMR (400 MHz, DMSO-d6) δ ppm 2.85 (t, J=5.81 Hz, 2H), 3.09-3.17 (m, 2H), 3.69 (t, J=5.6 Hz, 2H), 3.69 (s, 3H), 4.12 (t, J=5.56 Hz, 2H), 4.63 (s, 2H), 6.32 (d, J=2.02 Hz, 1H), 7.13 (d, J=9.09 Hz, 1H), 7.19 (s, 3H), 7.43 (d, J=2.53 Hz, 1H), 7.47 (d, J=1.52 Hz, 1H), 7.57 (dd, J=9.09, 3.03 Hz, 1H), 7.87 (s, 2H), 8.60 (s, 1H).

Workup

  1. stirringthe reaction was stirred at room temperature for 60 hr
  2. additionwas added to these and they
  3. stirringwere stirred for another 24 hr
  4. customThe ether and hydrochloric acid were evaporated under a stream of nitrogen and it
  5. customwas purified by HPLC
  6. customThe proper fractions were collected

Sources & evidence

ORD record
ord-636035a3edc544b798a520fa8112af10
Source dataset
uspto-grants-2016_05
Patent number
US09328107B2

Reaction notes

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