potassium chromate 、 在
18-冠醚-6 作用下,
以
not given 为溶剂,
以20%的产率得到
参考文献:
名称:
A New Route to Heterosilsesquioxane Frameworks
摘要:
The substitution of an O atom in the Cy8 Si8 O12 framework by a heteroatom or a heteroatom-containing group (Z) provides a simple route to discrete heterosilsesquioxane frameworks 1. In this reaction the Cy8 Si8 O12 framework is initially opened with triflic acid and then treated with different nucleophiles (Cy=cyclohexyl; Z=NPh, SO4 , nBuBO2 , CrO4 ).