Synthesis of Bicyclic<i>N</i>-Methylpyrazoline and Pyrazole Derivatives from α,β-Unsaturated Ketones and<i>N</i>,<i>N</i>-Dimethylhydrazine: An Illustration of Reductive Cyclization
作者:A. K. Panda、U. Das、J. W. Quail、J. R. Dimmock
DOI:10.1002/jhet.1570
日期:2014.1
The reaction of N,N‐dimethylhydrazine with α,β‐unsaturated keto precursors such as 2‐benzylidenecyclohexanone, 2,6‐bis(benzylidene)cyclohexanone, and 3,5‐bis(benzylidene)‐1‐methyl‐4‐piperidone hydrochloride provided bicyclic N‐methylpyrazoles instead of hydrazones or any Michael addition products. The crystal structure of a representative pyrazole is reported. The proposed mechanism for the formation
Antiinflammatory activity is demonstrated by compounds having the formula ##STR1## wherein R.sub.1 is hydrogen, chloro, fluoro, alkyl, alkoxy or trifluoromethyl and R.sub.2 is hydrogen, alkyl, arylalkyl, hydroxyalkyl, or carboximidamide, or pharmaceutically acceptable salts thereof.
Piperidine Derivatives. XIX. Esters of Substituted 4-Piperidinols
作者:S. M. McElvain、Kurt Rorig
DOI:10.1021/ja01185a052
日期:1948.5
1,3-DIMETHYLPIPERIDONE-4
作者:DAVID R. HOWTON
DOI:10.1021/jo01180a003
日期:1945.7
Tricyclic thiazolo[3,2-<i>a</i>]thiapyrano[4,3-<i>d</i>]pyrimidines and related analogs as potential anti-inflammatory agents
作者:George Rovnyak、Virginia Shu、Joseph Schwartz
DOI:10.1002/jhet.5570180219
日期:1981.3
A series of novel tricyclic thiazolo[3,2-a]thiapyrano[4,3-d]pyrimidines and related oxa, aza and carbo analogs of general formula 1 were prepared by a convenient addition-cyclization reaction involving 2-amino-2-thiazoline (4) and bisarylidene ketones of formula 3. Some of these compounds demonstrated antiinflammatory activity.
通过方便的涉及2-氨基-2-的加成环化反应,制备了一系列新型的三环噻唑并[3,2- a ]噻并吡喃并[4,3- d ]嘧啶及相关的通式1的氧杂,氮杂和碳氧化合物。式3的噻唑啉(4)和双芳基酮。其中一些化合物具有抗炎活性。