Reactions of some bicycloalkyl iodides with bromine
作者:Kenneth B. Wiberg、William E. Pratt、Michael G. Matturro
DOI:10.1021/jo00135a007
日期:1982.7
Kopecky, Jan; Smejkal, Jaroslav, Collection of Czechoslovak Chemical Communications, 1980, vol. 45, # 11, p. 2965 - 2970
作者:Kopecky, Jan、Smejkal, Jaroslav
DOI:——
日期:——
The di-.pi.-methane rearrangement. 226. Molecular rods: synthesis and properties
作者:Howard E. Zimmerman、Russell K. King、Michael B. Meinhardt
DOI:10.1021/jo00046a034
日期:1992.9
Our earlier synthetic methodology affording bicyclo[2.2.2]octyl [1]-rod and [2]-rod systems proved inadequate for [41-rods. New synthetic approaches were developed, and [3]- and [41-rod molecules were obtained. Sodium-potassium coupling was employed to afford the longer rod units. A radical anion approach gave lower yields. Hybrid rods with aromatic rings interposed were also synthesized. Rods of 9.2-, 9.7-, 13.4-, 13.9-, and 18.2-angstrom length were included in this study. Consideration of rod chirality suggests each bicyclooctane rod unit to be stereogenic, either P (clockwise) or M (anticlockwise). Thus, in a [1]-rod there are enantiomers and in a [2]-rod there are diastereomers. Molecular mechanics treatment of rod stereoisomerization was carried out. Interconversion of enantiomers of the [l]-rod and diastereomers of the [n]-rods should be very rapid at room temperature. X-ray analysis of the 4,4'-dimethoxy-[2]-rod reveals an achiral conformation. AMI quantum mechanics computations were carried out on [n]-rod radical cations and bridgehead cations.
Reaction of 1,4-diiodonorbornane, 1,4-diiodobicyclo[2.2.2]octane, and 1,5-diiodobicyclo[3.2.1]octane with butyllithium. Convenient preparative routes to the [2.2.2]- and [3.2.1]propellanes
作者:Kenneth B. Wiberg、William E. Pratt、William F. Bailey
DOI:10.1021/ja00449a045
日期:1977.3
"Mixed staffanes" as intermediate-length staffs for molecular-size tinkertoys. Parent hydrocarbons and terminal diiodides combining bicyclo[1.1.1]pentane with cubane or bicyclo[2.2.2]octane units
作者:Karin Hassenrueck、Gudipati S. Murthy、Vincent M. Lynch、Josef Michl