Stereospecific synthesis of selectively C-7-acetalized substituted 4a.beta.-methyl-3,4,4a,5,6,8a.alpha.-hexahydronaphthalene-1(2H),7(8H)-diones. A short total synthesis of (.+-.)-.beta.-eudesmol, (.+-.)-.beta.-selinene, and (.+-.)-.beta.-dictyopterol
Stereospecific synthesis of selectively C-7-acetalized substituted 4a.beta.-methyl-3,4,4a,5,6,8a.alpha.-hexahydronaphthalene-1(2H),7(8H)-diones. A short total synthesis of (.+-.)-.beta.-eudesmol, (.+-.)-.beta.-selinene, and (.+-.)-.beta.-dictyopterol
Two new compounds, 7-hydroxycostal (2) and 7-hydroxycostal (3), were isolated from infected sweetpotatoes as members of a newclass of sweetpotatophytoalexins.
Samarium (II) iodide-induced intermolecular coupling of α,β-unsaturated esters with ketones: reactions of methyl propiolate and ethyl buta-2,3-dienoate with cyclohexanone and its application to synthesis of a terpene carboxylic acid
作者:Masakazu Sono、Natsuki Doi、Eri Yoshino、Sachiko Onishi、Daiki Fujii、Motoo Tori
DOI:10.1016/j.tetlet.2013.01.120
日期:2013.4
propiolate and ethyl buta-2,3-dienoate with cyclohexanone induced by SmI2 occurred either at α- or β-position to yield different products depending on with or without a proton source. The synthesis of terpenic acid was demonstrated using this reaction.