- CARBON-CARBON BOND FORMATION AND KETENIMINE SYNTHESIS FROM N-PHENYL IMIDOTHIOESTERS.
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Methyl N-phenyl ethanimidothioate 1 and its α-silylated homologue 2 are metallated into lithiated enaminates which can be regioselectively monoalkylated at -78 deg C on the α-carbon atom.Imidothioester 2, treated at higher temperatures by 2 equivalents of BuLi, leads, after alkylation or hydrolysis, to stable silylated N-phenyl ketenimines.Formation of ketenimines are also observed by flash thermolysis of 2 or of the silylated S,N-ketene acetal 10.
- Lage, Nadia,Masson, Serge,Thuillier, Andre
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p. 141 - 144
(2007/10/02)
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- Organic nitriles as insect antifeedants
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Members of a novel class of organic nitriles related to an indole alkoaloid of Dithyrea wislizenii (Cruciferae) have been discovered to be potent feeding inhibitors of the fall armyworm and European corn borer.
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- Gas- Phase Ion Chemistry of Siloxide and Silamide Ions by Using the Flowing Afterglow. Unusual Rearrangements Involving SiO and SiS Bond Formation
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Siloxide ions undergo O/S exchange reactions with suitable sulfur-containing neutrals, e.g.H3SiO- + CS2 -> H3SiS- + COS.Silamide ions similarly undergo NR/O and NR/S exchange reactions together with nucleophilic displacement reactions, e.g.: .No simple correlation between rate and mechanism is observed for all the studied reactions.
- O'Hair, Richard A.J.,Sheldon, John C.,Bowie, John H.,Damrauer, Robert,DePuy, Charles H.
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p. 489 - 496
(2007/10/02)
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- A NOVEL ROUTE TO THIOKETENES BY FLASH VACUUM THERMOLYSIS OF SILYLATED KETENE DITHIOACETALS, SYNTHESIS OF PROPADIENETHIONE.
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Flash vacuum thermolysis (fvt) of silylated ketene dithioacetals 2 leads to reactive thioketenes 1.This method, added to a retrodienic reaction, allowed access to propadienethione 3.
- Vallee, Yannick,Masson, Serge,Ripoll, Jean-Louis
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p. 4313 - 4314
(2007/10/02)
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- Studies of silyl and germyl group VI species. Part VI. Synthesis and vibrational spectra of methylthiosilanes
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Methylthiosilanes of the type (CH3)nH3-nSiSCH3, n = 0-3, and (CH3)HSi(SCH3)2 have been prepared.Their ir and Raman spectra were recorded and assigned.The assignments were supported by normal coordinate analyses based on a modified valence force field.
- Drake, John E.,Glavincevski, Boris M.,Khasrou, Layla N.
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p. 2909 - 2920
(2007/10/02)
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