Use of the Ullmann Reaction for the Synthesis of Heterocyclic Compounds
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Authors
Nagler, Lisa A.
Issue Date
1979
Type
Thesis
Language
en_US
Keywords
Alternative Title
Abstract
3,4,5-Tribromo-N,N,a-trimethylpyrazole -acetamide (1) and
3,4,5-Tribromo-l-methylpyrazole (9) reacted with copper powder
to give the 5,5 -bipyrazoles (2) and (15), respectively. Attempts
to dimerize the ethyl ester of 3,4,5-tribromopyrazole-l-acetic
acid (l0) gave the dibromo ester (18) as the major reaction
product. The related l-substituted-2,4,5-tribromoimidazoles (4a)
and (4b) dimerized to give 2,2 1 -biimidazoles while 4,S-dibromo-N,
N,a-trimethylimidazole-l-acetamide did not react with copper
powder. Attempts to cyclize the bipyrazoles (6) and (23) to
tricyclic products were unsuccessful.
Description
iv, 28 p.
Citation
Publisher
Kalamazoo College
License
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