23894-57-7Relevant academic research and scientific papers
Bicyclic Pyridinylpyrazoles
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Page/Page column 29, (2011/10/19)
Bicyclic pyridinylpyrazoles of the formula (I) in which the symbols have the meanings given in the description and agrochemically active salts thereof and their use for controlling unwanted microorganisms in crop protection and the protection of materials
A divergent strategy to the withasomnines
Foster, Robert S.,Huang, Jianhui,Vivat, Jerome F.,Browne, Duncan L.,Harrity, Joseph P. A.
experimental part, p. 4052 - 4056 (2009/12/06)
A concise synthesis of three members of the withasomnine family of natural products is reported. The synthesis features a regioselective sydnone-alkynylboronate cycloaddition followed by Suzuki cross coupling and silyl group removal, and marks the first d
Intramolecular Reaction of the Hydrazonyl Group with Formyl and Oxo Groups: Preparation of Pyrazoloindoles and Related Pyrazolo Compounds
Shen, Jing-Kang,Katayama, Hajime,Takatsu, Noriyuki,Shiro, Itsuo
, p. 2087 - 2098 (2007/10/02)
Lewis acid-catalysed intramolecular nucleophilic attack of a hydrazonyl group onto aldehyde and ketone groups gives pyrazoles and dihydropyrazoles.Pyrazoloindoles and related pyrazolo compounds have also been prepared.
A NOVEL AND PRACTICAL ONE STEP SYNTHESIS OF 5,6-DIHYDRO-3-PHENYL-4H-PYRROLO (1,2-b) PYRAZOLE (WITHASOMNINE)
Ranganathan, Darshan,Bamezai, Shakti
, p. 259 - 266 (2007/10/02)
Withasomnine (2), the only bicyclic pyrazole alkaloid found thus far in Nature, has been prepared, in one step, by cyclo-addition of and the strained bicyclic meso-ionic system 1, derived from L-proline.The cyclo-addition also gives the novel, un-natural isomer 3.
