Tandem radical cyclizations promoted by O-stannyl ketyls
作者:Eric J. Enholm、Janet A. Burroff
DOI:10.1016/s0040-4020(97)00933-2
日期:1997.10
work summarizes an investigation of tandem radical cyclizations triggered by O-stannyl ketyls. This organometallic reactive intermediate is prepared from the reaction of tributyltin hydride (nBu3SnH) with a carbonyl functional group by a free radical chain mechanism. Several precursor substrates leading to “separated,” “spiro,” and “fused” cyclopentaniod ring systems were investigated which collectively
作者:Yong Seo Cho、Hye Yeon Kim、Joo Hwan Cha、Ae Nim Pae、Hun Yeong Koh、Jung Hoon Choi、Moon Ho Chang
DOI:10.1021/ol025856i
日期:2002.6.1
[GRAPHIC]Intramolecular Prins-type reactions of compounds having both functionalities of homoallyl alcohol and acetal moiety are described. The intramolecular Prins cyclizations were performed using indium trichloride in chloroform or 25% aqueous THE Both 9-oxabicyclo[3.3.1]nonane and 3,9-dioxabicyclo[3.3.1]nonane compounds were successfully obtained in moderate yields.