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

Participants

Reaction Steps

1.00 g (7.14 mmol) of 4-chlorobenzaldehyde, 1.03 g (7.14 mmol) of Meldrum's acid and 39.1 mg (0.34 mmol) of D,L-proline were added to a solution of 1.30 g (6.80 mmol) of the compound from Example 10A in 57 ml of acetonitrile. The reaction mixture was stirred at RT overnight. It was concentrated, and the crude product was stirred in diethyl ether and filtered, and the precipitate was dried under high vacuum to result in 1.38 g (44% of theory) of the title compound.

Provenance & Evidence