Dichloromethane → (4R,9aR)-4-Methyl-6-(pyrrolidine-1-carbonyloxymethyl)-3,4,9,9a-tetrahydro-1H-2,4a,5-triaza-fluorene-2-carboxylic acid tert-butyl ester

温度

0 °C

A mixture of 6-hydroxymethyl-4-methyl-3,4,9,9a-tetrahydro-1H-2,4a,5-triaza-fluorene-2-carboxylic acid tert-butyl ester (0.02 g, 0.063 mmol) and DCM (1 mL) was cooled to 0° C. and carbonyl diimidazole (0.010 g, 0.063 mmol) was added, the mixture was stirred at 0° C. for 2 h and stirred at room temperature for 3 h. A mixture of pyrrolidine (10 mL, 0.13 mmol) and DCM (1 mL) was added and the reaction mixture was sealed and shaken at 60° C. for 48 h. The reaction mixture was cooled and water (2 mL) added, the mixture was shaken at room temperature for 1 h then filtered through a PTFE frit. The filtrate was evaporated and the crude product purified by reverse phase preparative HPLC (Prep Nova-Pak HR C18 6 μm 60 Å 30 mm×300 mm column, UV detection at 254 nm, mobile phase 95:5 methanol:water and 10 mmol ammonium acetate, gradient 50 methanol to 100% 0 to 10 min then 100% methanol to 13 min) to afford the title compound (0.16 g, 61% yield) as a pale yellow oil: m/z 417.07 (MH+); HPLC (50% to 80% gradient [95:5 MeOH:water, 10 mmol ammonium acetate] 255 nm XTERRA 2.0 ml/min) 4.20 min, 99.3%.

1. stirringstirred at room temperature for 3 h
2. additionwas added
3. customthe reaction mixture was sealed
4. stirringshaken at 60° C. for 48 h
5. temperatureThe reaction mixture was cooled
6. stirringthe mixture was shaken at room temperature for 1 h
7. filtrationthen filtered through a PTFE frit
8. customThe filtrate was evaporated
9. customthe crude product purified by reverse phase preparative HPLC (Prep Nova-Pak HR

ORDレコード

ord-fff4071b81fb4b7f95c5b75670c0f940

出典データセット

uspto-grants-2006_08

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07098337B2