Abstract:Die Criegee-Umlagerung des (nicht isolierbaren) p-Nitrobenzolsulfonats vom 1.3.3-Trimethylcyclohexylhydroperoxid (1) ergibt [1.3.3-Trimethyl-cyclohexyl]-[1.4.4-trimethyl-2-oxa-cycloheptyll-peroxid (4), nicht jedoch das von Corey und White (1958) beschriebene 1.5-Dimethyl-6-oxa[3.2.l]bicyclooctan (3). Entsprechend werden bei der Umlagerung des p-Nitro-benzoats von 1 unter hydrolysierenden Bedingungen 1 -Hydroxy-2.2-dimethyl-heptanon-(6) (6) und bei der Hock-Umlagerung von 1 1 -Acetoxy-2.2-dimethyl-heptanon-(6) … Show more
Various N-substituted benzotriazoles are transformed,
by scission of the C-benzotriazole bond, into
the corresponding carbanions by treatment with lithium. Thus,
N-(diphenylmethyl)benzotriazole
(1), N-benzylbenzotriazole (6), and
N-allylbenzotriazole (10) all gave carbanions
that reacted with
diverse electrophiles to afford the corresponding products in good
yields. This new methodology
was successfully utilized to convert N-benzylbenzotriazole
(6) and N-allylbenzotriazole (10)
into
dianion synthons by a sequential lithiation and reductive coupling and
bis(benzotriazolyl)toluene
(18) by double reductive couplings, demonstrating the
synthetic potential of the present methodology.
Various N-substituted benzotriazoles are transformed,
by scission of the C-benzotriazole bond, into
the corresponding carbanions by treatment with lithium. Thus,
N-(diphenylmethyl)benzotriazole
(1), N-benzylbenzotriazole (6), and
N-allylbenzotriazole (10) all gave carbanions
that reacted with
diverse electrophiles to afford the corresponding products in good
yields. This new methodology
was successfully utilized to convert N-benzylbenzotriazole
(6) and N-allylbenzotriazole (10)
into
dianion synthons by a sequential lithiation and reductive coupling and
bis(benzotriazolyl)toluene
(18) by double reductive couplings, demonstrating the
synthetic potential of the present methodology.
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