α－羰基烯酮环二硫代缩醛化学（ⅩⅢ）──β，β－1，3－亚丙二硫基－α，β－不饱和酮在镁－甲醇中的还原反应

The Chemistry of α-Oxo Ketene Cyclic Dithioacetals (Ⅹ Ⅲ)-the Magnesium-methanol Reduction of β,β-1,3-Propylenedithio-α,β-Unsaturated Ketones

标题化合物１在镁－甲醇中还原主要得到碳碳和碳氧双键皆被还原的产物２，伴随产生少量１，４－还原产物３。该反应以先后１，４－、１，２－还原的方式进行，还原反应进行的程度与反应物的结构有关。

The title compounds can been reduced with magnesium in methanol.The products which carbon carbon and carbon oxygen double bonds were reduced in (1)were obtained as the main products.The reaction was proceeded in sequential 1, 4- and 1,2-reduction manner for the 1,4-reduction products were also seperated. The relationship between substrates and products was proposed based on the reaction results.