Thermally-induced one-step construction of the tetracyclic steroidal skeleton from acyclic enyne-allenes
摘要:
On heating, acyclic enyne-allenes 5 underwent a sequence of intramolecular transformations with a cascade of energy to produce 9 having the tetracyclic steroidal skeleton in a single step.
Allylpalladium(II) complexes derived from 1,2,6-heptatriene and 1,2,8-nonatriene
作者:John Powell、Norman I. Dowling
DOI:10.1016/0022-328x(84)85083-4
日期:1984.3
The reaction of 1,2,6-heptatriene with PdCl2(PhCN)2 gives a mixture of di-μ-chlorodi[1-(but-3-en-1-yl)-2-chloroallyl]di-palladium(II) and di-μ-chloro-di(η3-2-methylene-3-chlorocyclohexyl)dipalladium(II) which could not be separated by conventional techniques. The structures of these compounds are ascertained from a study of the 1H and 13C NMR spectra and chemical properties of the mixture. A mechanism
Cascade Radical Cyclizations via Biradicals Generated from (<i>Z</i>)-1,2,4-Heptatrien-6-ynes
作者:Kung K. Wang、Zhongguo Wang、Anna Tarli、Peter Gannett
DOI:10.1021/ja9622620
日期:1996.1.1
acyclic enyne−allene 4 underwent intramolecular transformations in a sequence with an initial Myers cycloaromatization to form α,3-didehydrotoluene biradical 5 followed by a 5-exo cyclization of the benzenoid radical center in 5 to produce 6. Biradical 6 then decayed through a 1,5-hydrogen shift to furnish o-quinodimethane 7, which in turn was captured in an intramolecular Diels−Alder reaction to afford
Competitive Intramolecular Reactions of <i>n</i>-Alkenyl- and <i>n</i>-Alkyl-Substituted Cyclopropylidenes: An Insertion Reaction into Nonactivated C−H Bonds
作者:Udo H. Brinker、Thomas Miebach
DOI:10.1021/jo990972t
日期:1999.10.1
Chemistry of gem-Dihalocyclopropanes. V.<sup>1</sup> Formation of Tricyclo[4.1.0.0<sup>4,6</sup>]heptane and Derivatives
作者:Lars Skattebøl;
DOI:10.1021/jo01347a014
日期:1966.9
Thermally-induced one-step construction of the tetracyclic steroidal skeleton from acyclic enyne-allenes
作者:Yemane W. Andemichael、Ying Huang、Kung K. Wang
DOI:10.1021/jo00059a005
日期:1993.3
On heating, acyclic enyne-allenes 5 underwent a sequence of intramolecular transformations with a cascade of energy to produce 9 having the tetracyclic steroidal skeleton in a single step.