Sodium triacetoxyborohydride → HCID 178521405, compound

HRID 1051439Notes

Reaction equation

[CH2:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH2:4][CH2:3][N:2]1[CH2:11][CH:12]([OH:23])[CH2:13][O:14][C:15]1[CH:16]=[C:17]([CH:20]=[CH:21][CH:22]=1)[CH:18]=O.[NH:24]1[CH:28]=[CH:27][C:26]([NH2:29])=[N:25]1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+]>C(Cl)Cl>[NH:24]1[CH:28]=[CH:27][C:26]([NH:29][CH2:18][C:17]2[CH:16]=[C:15]([CH:22]=[CH:21][CH:20]=2)[O:14][CH2:13][CH:12]([OH:23])[CH2:11][N:2]2[CH2:3][CH2:4][C:5]3[C:10](=[CH:9][CH:8]=[CH:7][CH:6]=3)[CH2:1]2)=[N:25]1

Participants

Conditions

Temperature: 60 °C

Procedure

To a solution of 3-(3-(3,4-dihydroisoquinolin-2(1H)-yl)-2-hydroxypropoxy)benzaldehyde (200 mg, 0.64 mmol) in DCM (15 mL) was added 1H-pyrazol-3-amine (80 mg, 0.96 mmol). The solution was heated at 60° C. for 0.5 h. NaBH(OAc)3 (204 mg, 0.96 mmol) was then added into the reaction mixture which was heated at 60° C. for another 1 h. The reaction mixture was quenched by adding 1 N HCl aqueous solution and diluted with DCM and washed with NaHCO3 aqueous solution. The separated organic layer was concentrated and the crude product was purified by preparative HPLC purification. (26 mg, yield 11%). MS (ESI+) e/z: 379.1 [M+1]. 1H NMR (MeOD, 400 MHz), δ ppm: 7.33-7.18 (m, 7H), 7.00-6.96 (m, 2H), 6.84-6.80 (m, 1H), 4.48-4.44 (m, 3H), 4.28 (s, 1H), 4.06-3.98 (m, 2H), 3.59-3.56 (m, 2H), 3.42-3.39 (m, 2H), 3.20-3.15 (m, 2H).

Workup

temperaturewas heated at 60° C. for another 1 h
customThe reaction mixture was quenched
additionby adding 1 N HCl aqueous solution
additiondiluted with DCM
washwashed with NaHCO3 aqueous solution
concentrationThe separated organic layer was concentrated
customthe crude product was purified by preparative HPLC purification

Sources & evidence

ORD record: ord-0669af161a71418fb3147dc90face945
Source dataset: uspto-grants-2016_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09388173B2

Reaction notes

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