반응 #61309

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H7

(rac.)-(1R*,5S*)-7-{4-[2-(tert-Butyldimethylsilanyloxy)ethoxy]phenyl}-3,9-diazabicyclo[3.3.1]non-6-ene-3,6,9-tricarboxylic acid 3-tert-butyl ester 6-ethyl ester 9-(2,2,2-trichloro-1,1-dimethylethyl) ester

DIPEA

acetyl chloride

HCl dioxane

→

(rac.)-(1R*,5S*)-3-Acetyl-7-[4-(2-hydroxyethoxy)phenyl]-3,9-diazabicyclo-[3.3.1]non-6-ene-6,9-dicarboxylic acid 6-ethyl ester 9-(2,2,2-trichloro-1,1-dimethylethyl) ester

용매

MeOH

THF

CH2Cl2

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후처리

1. 1
   기타Purification of the residue by FC (EtOAc/heptane 1:1→EtOAc MeOH/EtOAc 1:9)

실험 절차

As for compound S1, from H7 (5.80 g, 7.73 mmol), CH2Cl2 (60 mL), 4M HCl/dioxane (60 mL), THF (50 mL), DMAP (47 mg, 0.384 mmol), DIPEA (5.29 mL, 31.7 mmol), acetyl chloride (0.604 mL, 8.08 mmol), and MeOH (5 mL). Purification of the residue by FC (EtOAc/heptane 1:1→EtOAc MeOH/EtOAc 1:9) led to the title compound (3.07 g, 69%). Rf=0.20 (EtOAc). LC-MS: Rt=4.80; ES+: 576.93.

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