title: Synthesis of a digermane-containing tricylic nonadecadienedione incorporating an equivalent of ring-opened THF.
abstract: The combination of 2 equiv of bis[bis(trimethylsilyl)amide]germylene (5) with 2 equiv of 4-phenyl-1,2,4-triazoline-3,5-dione (PTAD) in tetrahydrofuran (THF) results in the ring-opening of 1 equiv of THF to form 2,2,8,8-tetrakis(1,1,1,3,3,3-hexamethyl-disilazan-2-yl)-5,16-diphenyl-7,9,14-trioxa-1,3,5,16,18,19-hexaaza-2,8-digerma-tricyclo[13.2.1.13,6]nonadeca-6(19),15(18)-diene-4,17-dione (6). This fast and nearly quantitative reaction builds a 15-membered ring from five different molecules. The new ring, structurally assigned by X-ray crystallography, contains a flexible methylene chain that moves rapidly on the NMR time scale.
authors.affiliation: Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109-1055.
authors.forename: Amy C
authors.initials: AC
authors.lastname: Gottfried
authors.forename: Jia
authors.initials: J
authors.lastname: Wang
authors.forename: Erin E
authors.initials: EE
authors.lastname: Wilson
authors.forename: Larry W
authors.initials: LW
authors.lastname: Beck
authors.forename: Mark M
authors.initials: MM
authors.lastname: Banaszak Holl
authors.forename: Jeff W
authors.initials: JW
authors.lastname: Kampf