Etude de la photooxygenation par l'oxygene singulet, de la photooxygenation par l'anthracenedicarbonitrile-9,10 et de l'electrooxygenation de bicyclanylidenes en dioxetanes-1,2 dispiranniques
“Tied-back” carbocyclic intermediates in the preparation of very sterically strained olefins: Derivatives of tetra--butylethylene
作者:Edward R. Cullen、Frank S. Guziec、Mitchell I. Hollander、Christopher J. Murphy
DOI:10.1016/s0040-4039(01)82982-8
日期:1981.1
The preparations of the extremely sterically hindered olefins (12) and-(13) are described, and attempts to convert these compounds to other derivatives of tetra--butylethylene (1) are outlined.
The one-pot reaction of sterically hindered hydrazones with tellurium dichloride or tellurium tetrahalide in the presence of triethylamine in benzene afforded Δ3-1,3,4-telluradiazolines 1, a novel heterocycle, via 1,3-dipolar cycloaddition of telluroketones and diazo compounds, both generated in situ. The molecular structure of 1a was established by X-ray crystallographic analysis. The photolysis of
Selones as intermediates in the preparation of extremely sterically hindered molecules
作者:Frank S. Guziec、Lynn James SanFilippo、Christopher J. Murphy、Christine A. Moustakis、Edward R. Cullen
DOI:10.1016/s0040-4020(01)96723-7
日期:1985.1
The preparation and reactions of selones, selenium analogues of ketones, are described with particular emphasis on their utility in the preparation of extremely stericallyhindered molecules. Mechanistic questions related to these reactions are discussed and evidence for “active selenium” is presented. Selenophilic additions of organometallic compounds to selones are also reported.
Synthese von verbrückten derivaten des tetra-tert. Butylethens
作者:Adolf Krebs、Wolfgang Rüger、Wolf-Ulrich Nickel
DOI:10.1016/s0040-4039(01)92386-x
日期:1981.1
The sterically hindered alkenes and , which are potential precursors for the synthesis of tetra-tert.butylethene, were prepared. Attempts at the synthesis of via the thiadiazoline route failed.
制备了位阻链烯烃和,它们是合成四叔丁基乙烯的潜在前体。通过噻二唑啉路线合成的尝试失败。
Guciez, Frank S.; Murphy, Christopher J.; Cullen, Edward R., Journal of the Chemical Society. Perkin transactions I, 1985, p. 107 - 114
作者:Guciez, Frank S.、Murphy, Christopher J.、Cullen, Edward R.