title: Synthesis of oxacalixarenes incorporating nitrogen heterocycles: evidence for thermodynamic control.
abstract: [structure: see text] Oxacalix[2]arene[2]hetarenes are formed in a single step by cyclooligomerization of meta-diphenols with meta-dichlorinated azaheterocycles. The high selectivity for cyclic tetramer formation results from thermodynamic product control. Macrocycles as large as oxacalix[5]arene[5]hetarenes have been isolated under nonequilibrating conditions.
authors.affiliation: Department of Chemistry, Colby College, Waterville, Maine 04901, USA. jlkatz@colby.edu
authors.forename: Jeffrey L
authors.initials: JL
authors.lastname: Katz
authors.forename: Bram J
authors.initials: BJ
authors.lastname: Geller
authors.forename: Rebecca R
authors.initials: RR
authors.lastname: Conry