- On the synthesis of siloxanes. XXIV. Nucleophilic substitution reactions of 2-functional 1,3-dioxa-2,4,7-trisilacycloheptanes and 1,3-dioxa-2,4,8-trisilacyclooctanes
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2-Hydrogen-1,3-dioxa-2,4,7-trisilacycloheptanes and 2-hydrogen-1,3-dioxa-2,4,8-trisilacyclooctanes, each as a mixture of three configurational isomers, were synthesized and halogenated with chlorine and bromine in the presence of pyridine. The stereochemi
- Rühlmann,J?hnichen,Scheim,Scheller
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p. 1367 - 1375
(2007/10/03)
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- On the synthesis of siloxanes. XXIII. Synthesis and spectroscopic characterization of 2-functional 1,3-dioxa-2,4,7-trisilacycloheptanes
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A series of 2-functional 1,3-dioxa-2,4,7-trisilacycloheptanes was synthesized and characterized by means of 29Si NMR spectroscopy, gas chromatography, high performance liquid chromatography and gas chromatography-mass spectrometry.The signals were assigned to the various configurational isomers.This assignment was confirmed by independent synthesis of individual isomers.The sequence of the NMR signals of the all-cis and trans-trans isomers required for the determination of stereochemistry was found to be the same as that of the respective cyclotrisiloxanes.Keywords: Cyclosiloxanes; Synthesis; Spectroscopic characterization
- Ruehlmann, K.,Jaehnichen, S.,Scheim, U.,Scheller, D.,Keidel, F.
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