Functionalized Cyclic Disilenes via Ring Expansion of Cyclotrisilenes with Isocyanides
作者:Yu Ohmori、Masaaki Ichinohe、Akira Sekiguchi、Michael J. Cowley、Volker Huch、David Scheschkewitz
DOI:10.1021/om400054u
日期:2013.3.25
four-membered trisilacyclobutenes 2 with an exocyclic imine functionality as the major products of formal insertion into one of the Si–Si single bonds of 1. Minor quantities of the iminotrisilabicyclo[1.1.0]butanes 3 are obtained as side products, formally resulting from [1 + 2] cycloaddition of the isocyanides to the Si–Si double bond of 1. The bicyclo[1.1.0]butanes 3 become dominant at lower temperatures
作者:Michael J. Cowley、Yu Ohmori、Volker Huch、Masaaki Ichinohe、Akira Sekiguchi、David Scheschkewitz
DOI:10.1002/anie.201307450
日期:2013.12.9
Spontaneous reaction of carbon monoxide with cyclotrisilenes has been observed. Depending on the substitution pattern, the initial product of carbonylation either dimerizes or can be trapped to yield highly functionalized cyclic silenes.
From a Si<sub>3</sub>-Cyclopropene to a Si<sub>3</sub>S-Bicyclo[1.1.0]butane to a Si<sub>3</sub>S-Cyclopropene to a Si<sub>3</sub>S<sub>2</sub>-Bicyclo[1.1.0]butane: Back-and-Forth, and In-Between
作者:Vladimir Ya. Lee、Olga A. Gapurenko、Shogo Miyazaki、Akira Sekiguchi、Ruslan M. Minyaev、Vladimir I. Minkin、Heinz Gornitzka
DOI:10.1002/anie.201506625
日期:2015.11.16
Compact and highly reactive bicyclo[1.1.0]butanes constitute one of the most fascinating classes of organic compounds. Furthermore, interplay of bicyclo[1.1.0]butanes with their valence isomers, such as buta‐1,3‐dienes and cyclobutenes, is among the fundamental pericyclic transformations in organic chemistry. Herein we report the back‐and‐forth interconversion between the cyclotrisilenes and thiatrisilabicyclo[1
Isomeric Metamorphosis: Si<sub>3</sub>E (E = S, Se, and Te) Bicyclo[1.1.0]butane and Cyclobutene
作者:Vladimir Ya. Lee、Shogo Miyazaki、Hiroyuki Yasuda、Akira Sekiguchi
DOI:10.1021/ja800111r
日期:2008.3.1
(2.2616(19) A for 2b and 2.2771(13) A for 2c), a phenomenon explained by the important contribution of the trisilirene-chalcogen pi-complex character to the overall bonding of 2. Photolysis of 2a and 2b produced their valence isomers, the heavy cyclobutenes 3a and 3b, featuring flat four-membered Si3E rings and a planar geometry of the Si=Si double bond. The mechanism of such isomerization was studied
Cyclotrisilene,
(tBu2MeSi)4Si3, was reacted
with phenylacetylene to produce an unusual
1,2,5-trisilabicyclo[3.2.0]hepta-3,6-diene derivative, whose structure was
determined by NMR spectroscopy and X-ray crystallography; a mechanism for
its formation is proposed.