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
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
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.
(X=S) and acetylene derivative 17 on thermolysis via thiocarbonyl ylide, quantitatively. Pyrolysis of selenium analogue gave similar results. Allyl substituted 2-alkylidene-1,3,4-thiadiazolines 11a and 11b resulted in the novel formation of thiiranimine derivatives 19a and 19b and bicyclo[3.1.0]thiahexane derivatives 20a and 20bvia azathioallyl intermediates. Thiiranimine derivatives 19a and 19b were
Novel ring transformation in the reactions of 2-alkylidene-1,3,4-thiadiazolines and their selenium analogues
作者:Tokitoh Norihiro、Choi Nami、Ando Wataru
DOI:10.1016/s0040-4039(00)94445-9
日期:1990.1
Several new reaction modes were found in the thermolysis and photolysis of allyl substituted 2-alkylidene-l,3,4-thindinzolines and their selenium analogues. Photochemical reaction of 2-alkylidene-1,3,4-thiadiazolines resulted in a novel formation of thiiranimine derivatives via azathioallyl intermediates.
temperatures. Various reactions of 1, such as [2+3] and [2+4] cycloadditions, oxidation, reduction, and sulfurization, were investigated. Some of these reactions represent novel reactivities of a thionitrosocompound