93093-46-0Relevant academic research and scientific papers
Studies of intramolecular Diels-Alder reactions: preparation of methyl spirohepta-4,6-dien-1-yl esters and their internal cycloaddition reactivity
Gallacher, Gerard,Ng, Ang Ser,Attah-Poku, Samuel K.,Antczak, Kazimierz,Alward, Sandra J.,et al.
, p. 1709 - 1716 (2007/10/02)
Different routes to the spirohepta-4,6-dien-1-yl esters 5,6,7,26, and 28 are described and their intramolecular Diels-Alder reactivity examined.A sidechain oxygen substituent is essential for cyclization although its exact role in the cycloaddition remains obscure.The trienes 5,6, and 28 cyclize to the tetracyclo1.7.04.6.06.10>undecenes 9, 10, and 30 which are useful synthetic intermediates for the preparation of sesquiterpenes.
