proline dl-form → 5-([2-Chloro-4-(trifluoromethyl)phenyl]{7-[(methylsulfanyl)methyl]-1H-indol-3-yl}methyl)-2,2-dimethyl-1,3-dioxane-4,6-dione

Participants

Reaction Steps

1.50 g (7.19 mmol) of 2-chloro-4-(trifluoromethyl)benzaldehyde, 1.04 g (7.19 mmol) of Meldrum's acid and 39.4 mg (0.34 mmol) of D,L-proline were added to a solution of 1.21 g (6.85 mmol) of the compound from Example 8A in 57 ml of acetonitrile. The reaction mixture was stirred at RT overnight. It was concentrated, and the residue was taken up in diethyl ether and again concentrated. 3.64 g (75% of theory, 72% purity) of the title compound were obtained and were reacted without further purification.

Provenance & Evidence