反应详情

0.62 g (4.41 mmol) of 4-chlorobenzaldehyde, 0.64 g (4.41 mmol) of Meldrum's acid and 24 mg (0.21 mmol) of D,L-proline were added to a solution of 1.00 g (4.20 mmol) of the compound from Example 11A in 34 ml of acetonitrile. The reaction mixture was stirred at RT overnight. It was concentrated to result in 2.21 g (73% of theory) of the title compound with a purity of 64% which were reacted without further purification.

1. concentrationIt was concentrated