Stereoselective Synthesis of Tetralins Using Cationic Cyclizations. -Substituted tetralins including the sesquiterpene calamenene (III) are prepared by 6-endo cationic cyclization of alkenylarenes, effected by addition of an hypervalent iodine reagent followed by deiodination. -(APPELBE, R.; CASEY*, M.; DUNNE, A.; PASCARELLA, E.; Tetrahedron Lett. 44 (2003) 41, 7641-7644; Dep. Chem., Univ. Coll., Belfield, Dublin 4, Ire.; Eng.) -Mais 02-118
Convenient Synthesis of Heterobicycles by Domino Heck-Diels-AlderReactions.-Domino Heck-Diels-Alder reactions offer a new one-pot approach to tetrahydroisoindolines, tetrahydroisoindolinones, hexahydrobenzofurans, and hexahydropyrimidines. -(BHAT, LAXMINARAYAN; STEINIG, ARNO G.; APPELBE, RUTH; DE MEIJERE, ARMIN; Eur.
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