54053-76-8Relevant articles and documents
Metallacycle transfer from zirconium to main group elements: A versatile synthesis of heterocycles
Fagan, Paul J.,Nugent, William A.,Calabrese, Joseph C.
, p. 1880 - 1889 (2007/10/02)
The reaction of zirconium metallacycles is used to produce a variety of main group heterocycles including borole Diels-Alder dimers, galloles, indacyclopentadienes, siloles, germoles, stannoles, phospholes, arsoles, stiboles, bismoles, thiophenes, selenophenes, dihydrothiophenes, dihydroselenophenes, tetrahydrothiophenes, tetrahydro-selenophenes, stannacyclopentanes, phospholenes, and isothiazoles. An X-ray crytallographic study of the borole DielsAlder dimer of 1-phenyl-2,3,4,5-tetramethylborole is discussed and compared with the structure of 7-norbornenyl carbenium ions. The scope and potential for this metallacycle transfer reaction are delineated.
Zirconium-Mediated Ring Construction from Dienes: Remarkable Effect of Ligands on Stereochemistry
Nugent, William A.,Taber, Douglass F.
, p. 6435 - 6437 (2007/10/02)
-
Reactions of α-Halotetrahydrothiophene 1,1-Dioxides with Strong Bases
Neidlein, Richard,Doerr, Henning
, p. 1540 - 1548 (2007/10/02)
This article describes the halogenated sulfones 2, 3, 7, 11, 16 and 18 obtained from the hitherto unknown intermediates 4, 5, 6 and 8, 9, 10 and from 14, 15.An account is given of Ramberg-Baecklund-type reactions undergone by the α-halogenated cyclic sulfones 2a and 7 with bases at high temperature.