Potassium Carbonate → 2-(1',2'-Dihydro-2'-oxospiro[cyclohexane-1.3'-[3H]indol]-5'-yl)-1H-pyrrole-1-carboxylic acid, tert-butyl ester

온도

80 °C

To a solution of 5′-bromo-spiro[cyclohexane-1,3′-indolin]-2′-one (3.4 g, 12 mmol) in 1,2-DME (100 mL) under a nitrogen atmosphere was added tetrakis(triphenylphospine)palladium(0) (70 mg, 5 mol %). After 15 min, 2-borono-1H-pyrrole-1-carboxylic acid, 1-tert butyl ester (1.3 eq, 3.31 g, 15.6 mmol) and a solution of K2CO3 (2.3 eq, 3.83 g, 27.6 mmol) in water (5 mL) were added sequentially. The solution was heated to 80° C. for 3 h and allowed to cool. The reaction mixture was poured into water (200 mL) and extracted with EtOAc (2×100 mL). The organic layers were combined, washed with brine (150 mL) and dried over MgSO4. The solution was filtered, concentrated in vacuo, and the residue was purified by flash column chromatography on silica gel (eluting with 30% EtOAc/hexane) to give subtitled compound: (3.4 g, 76%) as a white powder, mp 177° C. 1H NMR (CDCl3; 300 MHz) δ 1.38 (s, 9H), 1.59–1.93 (m, 10H), 6.18 (m, 1H) 6.23 (‘t’, 1H, J=3 Hz), 6.91 (d, 1H, J=8 Hz), 7.21 (d, 1H, J=8 Hz), 7.34 (m, 1H), 7.44 (s, 1H), 8.33 (br s, 1H, D2Oex). MS ((+)−APCI) m/z 367 [(M+H)+]. Anal. Calcd for C22H26N2O3: C, 72.11; H, 7.15; N, 7.64. Found: C, 71.7; H, 7.16; N, 7.5.

1. temperatureto cool
2. extractionextracted with EtOAc (2×100 mL)
3. washwashed with brine (150 mL)
4. dry with materialdried over MgSO4
5. filtrationThe solution was filtered
6. concentrationconcentrated in vacuo
7. customthe residue was purified by flash column chromatography on silica gel (eluting with 30% EtOAc/hexane)

ORD 기록

ord-da0442915f5d4115aac6c6d518dc2906

출처 데이터셋

uspto-grants-2006_08

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US07084168B2