19907-21-2Relevant articles and documents
Condensation of Methyl Isopimarate with α,β-Unsaturated Aldehydes on Zeolites
Kuzakov, E. V.,Shmidt, E. N.,Bagryanskaya, I. Yu.,Rybalova, T. V.,Gatilov, Yu. V.,Barkhash, V. A.
, p. 171 - 178 (2007/10/02)
Reactions of methyl isopimarate with α-methylacrolein and acrolein over zeolites occur by two parallel pathways, Δ8(14)- and Δ8(9)-ene condensation, the former pathway being predominant.Under selected conditions, products of Δ8(14)-ene condensation undergo further conversions, namely intramolecular reaction of the aldehyde group with the double bond (similarly to cyclic Prins reaction) and cyclization of the resulting alcohol with perhydrobenzanthrene core to form an oxolane with a new type of skeleton.The direction of condensation of methylpimarate with unsaturated aldehydes is independent of the nature of enophiles and catalysts used.
PART I. EPOXYDES DITERPENIQUES : SYNTHESE ET REACTIVITE D'EPOXYDES DERIVES D'ACIDES RESINIQUES
Papillaud, B.,Tiffon, F.,Taran, M.,Miguel, B. Arreguy-San,Delmond, B.
, p. 1845 - 1858 (2007/10/02)
Epoxidation of methyl esters of resin acids with the pimarane skeleton with p-nitroperbenzoic acid has permitted the isolation of epoxides of the intracyclic double bond.Allylic diterpenic alcohols were obtained by acid-catalysed isomerisation of diterpene epoxides, and the action of Collins reagent on these allylic alcohols has been studied.
