反应详情

To a 0° C. solution, under argon, of 1.0 g of product from Example 6, 1.69 g of product from Example 70, 1.49 g of triphenylphosphine and 5.4 ml of tetrahydrofuran is added 0.988 g of diethyl azodicarboxylate in 1.4 ml of tetrahydrofuran. The reaction is stirred at room temperature for 48 hours, filtered and the filtrate concentrated in vacuo to give 5.18 g of thick oil. The oil is purified by chromatography (Silica Gel: 15-25% ethyl acetate/hexane) to give 0.805 g of the desired product.

1. filtrationfiltered
2. concentrationthe filtrate concentrated in vacuo