反应详情

温度

80 °C

A mixture of 5-bromo-1,3-dihydro-isoindole-2-carboxylic acid tert-butyl ester (200 mg, 0.67 mmol), Pd(OAc)2 (30 mg, 0.2 equiv), DPPP (55 mg, 0.2 equiv), TEA (0.93 mL, 10 equiv) and MeOH:DMSO (1:1, 4 mL) was stirred for 16 h under CO (balloon) at 80° C. LC-MS and TLC (20% EtOAc-Hexane) showed completion of the reaction. The Reaction mixture was concentrated to remove MeOH and diluted with EtOAc (10 mL), and washed with water (2×25 mL). The organic layer was dried (Na2SO4), concentrated and purified by silica gel column chromatography (eluent=20% EtOAc-Hexane), giving pure 1,3-dihydro-isoindole-2,5-dicarboxylic acid 2-tert-butyl ester 5-methyl ester (150 mg, 81%). MS (APCI+): m/z 178.1 (MH+−Boc).

1. customcompletion of the reaction
2. concentrationThe Reaction mixture was concentrated
3. customto remove MeOH
4. additiondiluted with EtOAc (10 mL)
5. washwashed with water (2×25 mL)
6. dry with materialThe organic layer was dried (Na2SO4)
7. concentrationconcentrated
8. custompurified by silica gel column chromatography (eluent=20% EtOAc-Hexane)