Thermal rearrangement of N-substituted pyrazoles to 4,4-dipyrazolylmethaneand 1,1,2-(4,4,4 ''-tripyrazolyl)ethane

Authors
Wheate, NJ Broomhead, JA Collins, JG Day, AI
Citation
Nj. Wheate et al., Thermal rearrangement of N-substituted pyrazoles to 4,4-dipyrazolylmethaneand 1,1,2-(4,4,4 ''-tripyrazolyl)ethane, AUST J CHEM, 54(2), 2001, pp. 141-144
Citations number
19
Categorie Soggetti
Chemistry
Journal title
AUSTRALIAN JOURNAL OF CHEMISTRY
ISSN journal
00049425 → ACNP
Volume
54
Issue
2
Year of publication
2001
Pages
141 - 144
Database
ISI
SICI code
0004-9425(2001)54:2<141:TRONPT>2.0.ZU;2-Q
Abstract
A mechanistic explanation is given for the thermal rearrangement of 1,1-dip yrazolylmethane to 4, 4'-dipyrazolylmethane (dpzm). This mechanism can, in part, be used to explain the formation of 1,1,2-(4,4',4 " -tripyrazolyl) et hane (tpze) from pyrazole and trichloroethanol. An improved synthesis for d pzm and the synthesis of tpze, a new pyrazole derivative, is presented.