“Tailor-Made” carbonyl ylides: [3 + 2] cycloaddition of the parent and optionally substituted nonstabilized carbonyl ylides
作者:Makoto Hojo、Hidenori Aihara、Hajime Ito、Akira Hosomi
DOI:10.1016/s0040-4039(96)02194-6
日期:1996.12
“Tailor-made” carbonyl ylides bearing only alkyl substituents or no substituents were efficiently generated from α-chloroalkyl α′-chloroalkyl ethers in the presence of samarium reagents. Using these novel and synthetically practical carbonyl ylides, optionally substituted and stereochemically defined tetrahydrofurans, dihydrofurans and dioxolane were synthesized in a single step.
在sa试剂的存在下,由α-氯烷基α'-氯烷基醚有效地产生仅带有烷基取代基或不带有取代基的“量身定制的”羰基亚烷基。使用这些新颖的和合成上可行的羰基酰基化物,可在一个步骤中合成任意取代的和立体化学定义的四氢呋喃,二氢呋喃和二氧戊环。