Organic Photochemistry. V. Dethioacetalization by Photolysis in the Presence of Molecular Oxygen
Organic Photochemistry. V. Dethioacetalization by Photolysis in the Presence of Molecular Oxygen
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有机光化学。
DOI：
10.1248/cpb.27.538
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发表时间：
1979
影响因子：
1.7
通讯作者：
B. Umezawa
中科院分区：
文献类型：
--
作者：
O. Hoshino;S. Sawaki;B. Umezawa
在200W高压汞灯下，5，6-二甲氧基-α-吲哚、α-和β-吲哚、α-四酮、5-α-和5-β-胆甾烷-3-酮、胆甾烯-3-酮和环己酮的乙二硫缩醛在合适的溶剂(正己烷、乙醇或苯)中进行光解，得到母体酮。胆甾烯-5-烯-3-酮的乙二硫缩醛在光解后经NaBH_4还原得到胆甾烯-4-烯-3β-o1，表现为光致双键异构化。
Photolysis (a 200 W high pressure mercury lamp) under oxygen stream of ethylene dithioacetals of 5, 6-dimethoxy-α-indanone, α-and β-indanone, α-tetralone, 5α-and 5β-cholestan-3-ones, cholest-4-en-3-one, and cyclohexanone in an appropriate solvent (nhexane, ethanol or benzene) was carried out to give the parent ketones. Ethylene dithioacetal of cholest-5-en-3-one on photolysis followed by NaBH4 reduction gave cholest-4-en-3β-o1, showing photo-induced isomerization of the double bond.