반응 #958137

반응 방정식

tert-butyl ((2S)-1-((2-(bis(4-methoxybenzyl)amino)-5-methyl-5H-chromeno[3,4-c]pyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate

TFA

→

5-methyl-5H-chromeno[3,4-c]pyridin-2-amine

수율 42.0%

용매

dichloromethane

반응 조건

후처리

1. 1
   기타The volatiles were evaporated
2. 2
   기타the crude material was purified by preparative HPLC (0.1% TFA in MeOH)

실험 절차

To a stirred solution of tert-butyl ((2S)-1-((2-(bis(4-methoxybenzyl)amino)-5-methyl-5H-chromeno[3,4-c]pyridin-8-yl)oxy)-4-methylpentan-2-yl)carbamate (110 mg, 0.165 mmol) in dichloromethane (10 mL) was added TFA (0.254 mL, 3.29 mmol) and the reaction was stirred at room temperature overnight. The volatiles were evaporated and the crude material was purified by preparative HPLC (0.1% TFA in MeOH) to afford 8-4(S)-2-amino-4-methylpentyl)oxy)-5-methyl-5H-chromeno[3,4-c]pyridin-2-amine (25 mg, 0.069 mmol, 42% yield) as a yellow solid. 1H NMR (400 MHz, MeOD) δ 7.74 (m, 2H), 6.84 (s, 1H), 6.75 (dd, J=2.4 Hz, J=8.4 Hz, 1H), 6.63 (d, J=2.4 Hz, 1H), 5.18 (m, 1H), 4.32 (m, 1H), 4.15 (m, 1H), 3.65 (m, 1H), 1.83 (m, 1H), 1.65 (m, 5H), 1.04 (m, 6H); LCMS (ESI) m/e 328.2 [(M+H)+, calcd for C19H26N3O2 328.2]; LC/MS retention time (Method D): tR=1.24 min; HPLC retention time (method A): tR=8.42 min.

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