Ga. Molander et Cr. Harris, SEQUENCED REACTIONS WITH SAMARIUM(II) IODIDE - TANDEM INTRAMOLECULAR NUCLEOPHILIC ACYL SUBSTITUTION INTRAMOLECULAR BARBIER CYCLIZATIONS/, Journal of the American Chemical Society, 117(13), 1995, pp. 3705-3716
Samarium(II) iodide has been employed to promote a tandem intramolecul
ar nucleophilic acyl substitution/intramolecular Barbier cyclization s
equence, generating bicyclic and tricyclic ring systems in excellent y
ield and high diastereoselectivity. Additionally, a highly versatile r
ing expansion-cyclization sequence allows entry into several different
naturally occurring tricyclic ring systems containing seven- and eigh
t-membered rings.