title: 4-metalated condensed pyrimidines: their preparation and reaction with aldehydes under Barbier-type conditions.
abstract: [reaction: see text] The organometallic intermediate obtained from halogen-metal exchanges of 4-iodo-6-phenylthieno[2,3-d]pyrimidine under Barbier-type conditions was reacted with aldehydes to form the corresponding alcohols in moderate yields. The reaction involving an organolithium intermediate proceeded only at low temperature, whereas the reaction involving a magnesium ate intermediate also proceeded at room temperature. A crystal structure confirms that the expected constitutional alcohol isomer is formed, where no migration has taken place. The conditions were also suitable for 9-benzyl-6-iodopurine.
authors.affiliation: Nucleic Acid Center, Department of Chemistry, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark.
authors.forename: Frans D
authors.initials: FD
authors.lastname: Therkelsen
authors.forename: Mario
authors.initials: M
authors.lastname: Rottländer
authors.forename: Niels
authors.initials: N
authors.lastname: Thorup
authors.forename: Erik Bjerregaard
authors.initials: EB
authors.lastname: Pedersen
mesh_terms: D000447:Aldehydes / Q000138:chemical synthesis* / Q000737:chemistry; D008956:Models, Chemical; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D011743:Pyrimidines / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D009942:Organometallic Compounds; D011743:Pyrimidines