CAS No. -8, 4-iodo-1-methylpyridin-2-one Price _ CAS Number
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Formula: C6H6INO
Molecular Weight: 235.02200
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Regioselectivity in the Thermal Rearrangement of Unsymmetrical 4-Methyl-4H-1,2,4-triazoles to 1-Methyl-1H-1,2,4-triazoles 英文参考文献.doc 10页
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Regioselectivity in the Thermal Rearrangement of Unsymmetrical 4-Methyl-4H-1,2,4-triazoles to 1-Methyl-1H-1,2,4-triazoles 英文参考文献
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Molecules 9-978
http://www.mdpi.org
Regioselectivity in the Thermal Rearrangement of
Unsymmetrical 4-Methyl-4H-1,2,4-triazoles to 1-Methyl-1H-
1,2,4-triazoles
Odd R. Gautun and Per H.J. Carlsen*
Department of Chemistry, Norwegian University of Science and Technology, N-7491 Trondheim,
Norway, Tel. +47 73 59 39 68, Fax +47 73 59 42 56.
* Author to whom correspondence e-mail:
per.carlsen@chembio.ntnu.no
Received: 14 March 2000; in revised form 26 October 2001 / Accepted: 26 October 2001 / Published:
30 November 2001
rearrangement
4-methyl-3,5-diaryl-4H-1,2,4-triazoles
corresponding 1-methyl-3,5-diaryl-1H-1,2,4-triazoles
regioselectivity comparable
to that observed for the alkylation of 3,5-diaryl-1H-1,2,4-triazoles. This lends support to a
rearrangement
consecutive
nucleophilic
displacements steps.
Keywords: Thermolysis, 1,2,4-triazole, Rearrangement, Regioselective.
Introduction
Previous studies
of the thermal
rearrangement reactions
of 4-alkyl
substituted 4H-1,2,4-triazoles to
corresponding
1-alkyl-1H-1,2,4-triazoles
supporting
intermolecular
nucleophilic
displacement
proceeding
dialkyltriazolium
triazolate
intermediates
or neutral
nucleophilic nature of
these rearrangements therefore
suggests that electronic effects
may play a role
outcome. Alkylation
of 3,5-disubstituted-1H-1,2,4-triazoles
exclusively at the ring 1-position [2].
On alkylation of unsymmetrical substituted triazoles Uda
Molecules 2000,
found that the 1-2 selectivity was affected by the nature of the substituents, and that alkylation takes place
preferentially at
nitrogen next
the ring-car
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1,1-二-(4-甲氧基苯基)-1-[4-(1H,1H,2H,2H-全氟癸基)苯基]甲醇,-0,进口
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