Реакция #215257

Уравнение реакции

2-methyl-11,12-dihydroxy-9,10-ethano-anthracene

lead tetraacetate

→

2-Methyl-9,10-anthracenedicarboxaldehyde

Растворители

acetic acid

Условия реакции

Обработка

1. 1
   workup.DISSOLUTIONis dissolved in 45 ml
2. 2
   Температураby cooling there
3. 3
   Фильтрацияare collected by filtration
4. 4
   Другоеrecrystallized from methylene chloride-methanol giving 1.1 g

Методика

A mixture of isomers of 2-methyl-11,12-dihydroxy-9,10-ethano-anthracene weighing 2.1 g. is dissolved in 45 ml. of glacial acetic acid and is treated at room temperature with 7.45 g. of lead tetraacetate until a starch-iodide test is positive. After 2-3 hours at room temperature followed by cooling there is deposited orange crystals, which are collected by filtration and recrystallized from methylene chloride-methanol giving 1.1 g. of orange crystals melting at 162°-164° C.

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