Ethyl orthoformate → HCID 68600031, compound

Participants

Reaction Conditions

Reaction Steps

10.00 g (25.62 mmol) of the compound from Example 20A are suspended in 250 ml of triethyl orthoformate and heated to 130° C. Then, over a total period of 8 hours, 15 drops of concentrated sulfuric acid are added each hour to the reaction mixture. It is then stirred at the same temperature overnight. After cooling, excess orthoester is removed in a rotary evaporator, and the crude product is purified by column chromatography (silica gel; mobile phase: cyclohexane/ethyl acetate 1:1). 7.20 g (65% of theory) of the title compound are obtained.

Provenance & Evidence