Tetrahedron Letters p. 3405 - 3408 (1987)
Update date:2022-08-05
Topics:
Ortuno, Rosa M.
Batllori, Rosa
Ballesteros, Montserrat
Monsalvatje, Montserrat
Corbera, Jordi
et al.
Chiral α, β-butenolides react with isoprene at 125-220 deg C giving a 1:1 mixture of Diels-Alder regioisomers, selectivity being dramatically increased by the use of AlCl3 as catalyst.While these butenolides give no reaction with furan even in the presenceof catalysts, they react smoothly with cyclopentadiene, endo/exo selectivity being temperature dependent.
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(1988)
