- chemistry,
arynes and
benzynes are a
class of
highly reactive chemical species derived from an
aromatic ring by
removal of two substituents.
Arynes are examples...
-
intermediates based on
carbon are radicals, carbenes, carbocations, carbanions,
arynes, and carbynes.
Reactive intermediates have
several features in common: low...
- synthesis,
methyl anthranilate can be used as a
source of the
highly reactive aryne, benzyne. It is
obtained by
diazotization of the
amine group using sodium...
-
undergo a [3+2]
dipolar cycloaddition with the
aryne to give the product, or a [3+2]
annulation with
aryne which would also give the
final product. While...
-
chloride reaction proceeds through a
classical aryne intermediate: The
isomers 1a and 1b form the same
aryne 2
which continues to
react to the
anilines 3a...
-
label was used to
determine the
mechanism in the 1,2- to 1,3-didehydrobenzene
conversion of the
phenyl substituted aryne precursor 1 to acenaphthylene....
-
Transition metal benzyne complexes are
organometallic complexes that
contain benzyne ligands (C6H4).
Unlike benzyne itself,
these complexes are less reactive...
- kJ/mol) but much less than that
required for a
proton abstraction to an
aryne (82 kcal/mol or 340 kJ/mol). In
alkene radicals proton abstraction to an...
-
occupied by the
leaving group. For example, cine-substitution is
observed in
aryne chemistry. Tele-substitution
occurs when the new
position is more than one...
-
bromine substituent replaced by an amine. This
rules out the
formation of an
aryne intermediate A
which would also give the 5-substituted isomer. The exclusion...
