ISSN:
1600-5368
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
Sydnones are, in most cases, extremely stable crystalline compounds that exhibit a distinct polarity. The five-membered heterocyclic ring that characterizes a sydnone is subject to electrophilic substitution. Only with a strongly activating group present will an attached aryl group compete effectively for the electrophile, due to the considerable partial positive change at the quaternary N atom of the sydnone ring. The title compound, C17H25BrN2O2Si, is of interest due to an intramolecular shift of the silyl-protecting group that occurs between the syndone ring and the aryl ring when treated with n-butyllithium. This was observed while attempting to replace the aryl bromine. With a curiosity into a rationale for this shift, we have examined a series of precursors, this being the first.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S160053680101563X
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