The synthesis of cis-tetraoxabicyclo decanes 2 and 7 have been performed by treatment of 2,3-diphenyl-5,6-dihydro-1,4-dioxin (1) or cis-2,3,5,6-tetraphenyl-5,6-dihydro-1,4-dioxin (3) with two equivalents of tris (p-bromophenyl)ammonium tetrafluoroborate in a dichloromethane(ethylene glycol mixture. The structural and conformational assignments have been made on the basis of spectroscopical and single crystal X-ray diffraction data. Similar reaction of 2,3,5, 6-tetraphenyl-p-dioxin (4) with the same one electron oxidizing agent in dichloromethane/alcohol mixtures afford trans-2,3-dialkoxy derivatives 8 and 9.
顺式四氧杂双
环癸烷 2 和 7 的合成是通过在
二氯甲烷(
乙二醇混合物)中用三(对
溴苯基)四
氟硼酸铵与 2,3
-二苯基-5,6-二氢-1,4-
二恶烷(1)或顺式-2,3,5,6-四苯基-5,6-二氢-1,4-
二恶烷(3)进行等量反应实现的。结构和构象的确定是基于光谱学和单晶 X 射线衍射数据。2,3,5,6-四苯基对
二恶烷(4)与相同的一电子氧化剂在
二氯甲烷/
乙醇混合物中的类似反应产生了反式-2,3-二烷氧基衍
生物 8 和 9。