Sodium triacetoxyborohydride → HCID 178521405, Verbindung

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).

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

ORD-Eintrag

ord-0669af161a71418fb3147dc90face945

Quelldatensatz

uspto-grants-2016_07

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09388173B2