title: Silver(I)-catalyzed novel cascade cyclization reactions: incorporation of allenes into the isochromenes.
abstract: [reaction: see text] The silver(I)-catalyzed reaction of alkynones with alcohols represents a general tool for the synthesis of 1-allenyl isochromenes. The reaction most probably proceeds via the formation of benzopyrylium cation, which subsequently undergoes nucleophilic attack of an alcohol to give the annulation products.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan yoshi@mail.tains.tohoku.ac.jp.
authors.forename: Nitin T
authors.initials: NT
authors.lastname: Patil
authors.forename: Nirmal K
authors.initials: NK
authors.lastname: Pahadi
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Yamamoto
mesh_terms: D000466:Alkadienes / Q000737:chemistry*; D000965:Antimony / Q000737:chemistry*; D001578:Benzopyrans / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D003500:Cyclization; D005459:Fluorides / Q000737:chemistry*; D015394:Molecular Structure; D012834:Silver / Q000737:chemistry*
chemical_list: D000466:Alkadienes; D001578:Benzopyrans; D012834:Silver; C025947:propadiene; D000965:Antimony; D005459:Fluorides