Synthesis, crystal structure and anti-malarial activity of functionalized spiro-1,2,4,5-tetraoxacycloalkanes from unsaturated hydroperoxy peracetals
作者:Yuji Nonami、Takahiro Tokuyasu、Araki Masuyama、Masatomo Nojima、Kevin J McCullough、Hye-Sook Kim、Yusuke Wataya
DOI:10.1016/s0040-4039(00)00688-2
日期:2000.6
Treatment of unsaturated hydroperoxy peracetals with bis(sym-collidine)iodine(I) hexafluorophosphate affords a series of iodine-containing spiro-1,2,4,5-tetraoxacycloalkane derivatives in high yield. In addition, ozonolysis of unsaturated hydroperoxy peracetals in AcOH-CH2Cl2 also results in the formation of spirol,2,4,5-tetraoxacycloalkanes. Two of the new compounds, 3-methyl-3-methyldioxy-1,2,6,7-tetraoxaspiro[7.11]nonadecane and dimethyl-4-iodo-1,2,6,7-tetraoxaspiro[7.11]nonadecane, exhibit significant in vitro antimalarial activity against P. falciparum with EC50 values of ca. 10(-7) M. (C) 2000 Elsevier Science Ltd. All rights reserved.