作者:Hashem Sharghi、Fatemeh Tamaddon
DOI:10.1002/jhet.5570380311
日期:2001.5
acid in the presence of methansulfonic acid and subsequently, cyclization of the obtained o-hydroxybenzophenones with K2CO3/dimethyl formamide, afforded haloxanthones 4 and 5 in high yields. Aromatic nucleophilic substitution of the resulted haloxanthones with O-, N- and S-nucleophiles are studied in a comparative manner, and various new O-, N- and S-substituted xanthones have obtained.
的酰化反应米与甲磺酸的存在下2,6- dihalobenzoic酸,并且随后,将所得到的环化甲酚ö具有K -hydroxybenzophenones 2 CO 3 /二甲基甲酰胺,得到haloxanthones 4和5以高收率。以比较的方式研究了用O-,N-和S-亲核试剂对所得卤代蒽酮的芳香亲核取代,并获得了各种新的O-,N-和S-取代的氧杂蒽。