1,2,3,4-Tetrahydroisoquinoline → [4-(3,4-Dihydro-1H-isoquinoline-2-carbonyl)-6,7-dimethoxy-isoquinolin-1-ylmethyl]-carbamic acid tert-butyl ester

HRID 14653

Reaction equation

HRID 14653 reaction equation
[C:1]([O:5][C:6]([NH:8][CH2:9][C:10]1[C:19]2[C:14](=[CH:15][C:16]([O:22][CH3:23])=[C:17]([O:20][CH3:21])[CH:18]=2)[C:13]([C:24](O)=[O:25])=[CH:12][N:11]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH2:27]1[C:36]2[C:31](=[CH:32][CH:33]=[CH:34][CH:35]=2)[CH2:30][CH2:29][NH:28]1.C(P(=O)(OCC)OCC)#N>C1COCC1>[C:1]([O:5][C:6](=[O:7])[NH:8][CH2:9][C:10]1[C:19]2[C:14](=[CH:15][C:16]([O:22][CH3:23])=[C:17]([O:20][CH3:21])[CH:18]=2)[C:13]([C:24]([N:28]2[CH2:29][CH2:30][C:31]3[C:36](=[CH:35][CH:34]=[CH:33][CH:32]=3)[CH2:27]2)=[O:25])=[CH:12][N:11]=1)([CH3:3])([CH3:2])[CH3:4]

Participants

5

Reactant 3

HCID 70461,2,3,4-TetrahydroisoquinolineHCID 76257Diethyl cyanophosphonateHCID 593410711-(tert-Butoxycarbonylamino-methyl)-6,7-dimethoxy-isoquinoline-4-carboxylic acid

Product 1

HCID 59341087[4-(3,4-Dihydro-1H-isoquinoline-2-carbonyl)-6,7-dimethoxy-isoquinolin-1-ylmethyl]-carbamic acid tert-butyl esterYield 66.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of 1-(tert-butoxycarbonylamino-methyl)-6,7-dimethoxy-isoquinoline-4-carboxylic acid (100 mg, 0.3 mmol) in 20 mL of THF was treated with 1,2,3,4-tetrahydroisoquinoline (44 mg, 0.33 mmol), TEA (56 mg, 0.552 mmol) and diethyl cyanophosphonate (55 mg, 0.33 mmol) according to the procedure described in example 1E to give [4-(3,4-Dihydro-1H-isoquinoline-2-carbonyl)-6,7-dimethoxy-isoquinolin-1-ylmethyl]-carbamic acid tert-butyl ester (88 mg, 66.9%). H1-NMR (CDCl3): δ, 8.31 (br s, 1H), 7.38 (br s, 1H), 7.15 (m, 5H), 6.82 (m, 1H), 6.18 (br s, 1H), 4.93 (s, 2H), 4.43 (m, 2H), 4.02 (br s, 3H), 3.92 (s, 2H), 3.58 (br s, 3H), 3.10 (br s, 1H), 2.80 (br s, 1H), 1.51 (s, 9H) [Note: broadening of peaks observed due to Boc group, rotamers also observed.]; MS: APCI (M+H) calc'd for C27H31N3O5+H 478.6; found 478.0.

Sources & evidence

ORD record
ord-9e702a37f4f143a8bc9eb81d2cbb98e3
Source dataset
uspto-grants-2010_06
Patent number
US07732446B1

Linked notes

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