反应详情

The process of Russian Inventor's Certificate 521,274 is a variant in which the macrocyclic ring is retained in all the reaction steps: II is converted into 12-oxo-15-pentadecanolide (VI) using butyl nitrite/sodium bisulphite, and the product is reduced by the Clemmensen method to give 15-pentadecanolide: ##STR5## The yield of I in this process is only 36%, as can be seen from the examples. Electrochemical reduction of VI to I in accordance with German Offenlegungsschrift 3,127,242 also proceeds in only moderate yields of about 60%.

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