Diastereoselective Synthesis of Polycyclic Acetal-Fused Pyrano[3,2-<i>c</i>]pyran-5(2<i>H</i>)-one Derivatives
作者:Ram Sagar、Jongmin Park、Minseob Koh、Seung Bum Park
DOI:10.1021/jo8023889
日期:2009.3.6
A facile and efficient diastereoselectiveone-pot synthesis of polycyclic acetal-fused pyrano[3,2-c]pyrane-5(2H)-one was achieved through the annulation reaction of 2-C-formyl glycals with various 4-hydroxycoumarins and 4-hydroxy-6-methyl-2H-pyran-2-one. The asymmetric induction was significantly influenced by the C-4 stereogenic center of 2-C-formyl glycals. The resulting polycyclic acetal-fused pyranopyrones
一种简便和多环缩醛稠合吡喃并高效非对映选择性一锅法合成并[3,2- c ^ ]吡喃-5-(2 ħ) -酮通过2-环反应实现Ç甲酰基烯糖与各种4-羟基香豆素和4-羟基-6-甲基-2- ħ吡喃-2-酮。不对称诱导受到2- C-甲酰基糖基的C-4立体生成中心的显着影响。所得多环缩醛稠合的吡喃并吡喃酮显示出抗癌活性。