5α-Cholestan-1a-ol与五氯化磷或亚硫酰氯形成5α-胆甾1-烯,1β-甲基-19-norcholest-5(10)-烯和1β-甲基-19-nor-5α的混合物-cholest-9-ene,同时在缓冲的丙酮水溶液中在65°下溶剂化5α-cholestan-1α-甲苯基对苯二甲酸磺酸盐时,得到的是相同的三种烯烃和一些5α-cholestan-1α-ol的相似混合物。使用相同试剂的5α-Cholestan-1β-ol可得到单晶烯烃9aζA-nor-B-homo-19-norcholest-5(10)-烯,同时溶剂化5α-cholestan-1β-yl甲苯-p -磺酸盐主要产生非晶的9a-亚甲基-A -nor- B -homo-19-nor-5α-胆甾烷和一些5α-胆甾烷-1β-ol。
Intramolecular β,γ-addition of allylic alkoxyl radicals. A new general synthesis of α-iodoepoxides by photolysis of allylic alcohol hypoiodites in the presence of mercury(<scp>II</scp>) oxide, iodine and pyridine in benzene
作者:Hiroshi Suginome、Jian Bo Wang
DOI:10.1039/c39900001629
日期:——
The formation of α-iodoepoxides arising from an intramolecularβ,γ-addition of an allylicalkoxylradical is a major general process in the photolysis of tertiary and some secondary allylicalcoholhypoiodites in the presence of iodine and pyridine in benzene.