Facile One-Pot Synthesis of 1,3,5-Trisubstituted Pyrazoles from α,β-Enones
作者:Jin Yu、Ko Hoon Kim、Hye Ran Moon、Jae Nyoung Kim
DOI:10.5012/bkcs.2014.35.6.1692
日期:2014.6.20
efficient one-pot synthesis of 1,3,5-trisubstituted pyrazoles from α,β-enones and arylhydrazinehydrochlorides has been developed. The pyrazoles were formed via a tandem formation of the correspondingpyrazolines and an acid-catalyzed aerobic oxidation process.Key Words : Pyrazoles, One-pot synthesis, Aerobic oxidation, α,β-Enones Introduction1,3,5-Trisubstituted pyrazolines are important heterocycliccompounds
Regioselective Synthesis of Polysubstituted Pyrazoles and Isoxazoles
作者:Alan R. Katritzky、Mingyi Wang、Suoming Zhang、Michael V. Voronkov、Peter J. Steel
DOI:10.1021/jo0101407
日期:2001.10.1
A regioselectivesynthesis has been developed for the preparation of unsymmetrical 1,3,5-triaryl-4-alkylpyrazolines and -pyrazoles by treatment of alpha-benzotriazolyl-alpha,beta-unsaturated ketones with monosubstituted hydrazines followed by alkylation at the 4-position of the pyrazoline ring. Reaction of alpha-benzotriazolyl-alpha,beta-unsaturated ketones with hydroxylamine gives 3,5-disubstituted
A robust protocol for Pd(ii)-catalyzed C-3 arylation of (1H) indazoles and pyrazoles: total synthesis of nigellidine hydrobromide
作者:Mengchun Ye、Andrew J. F. Edmunds、James A. Morris、David Sale、Yejia Zhang、Jin-Quan Yu
DOI:10.1039/c3sc50184a
日期:——
indazole and pyrazoles are privileged structural motifs in agrochemicals and pharmaceuticals. C-3 C-H arylation of (1H) indazole and pyrazole has been a significant challenge due to the poor reactivity of the C-3 position. Herein, we report a practical Pd(II)/Phen catalyst and conditions for direct C-3 arylation of indazole and pyrazole with ArI or ArBr without using Ag additives as halide scavengers. The
An unambiguous synthesis of pyrazoles by sulphur extrusion from 1,2,6-thiadiazines
作者:José Barluenga、J. Francisco López-Ortiz、Miguel Tomás、Vicente Gotor
DOI:10.1039/p19810001891
日期:——
chloride and sulphur monochloride and dichloride giving different 1,2,6-thiadiazine S-oxides (3) and 1,2,6-thiadiazines (4), respectively. These last two compounds lead, by heating, to pyrazoles (6)via thermal extrusion of sulphur oxide or sulphur. On the other hand, 1,2,6-thiadiazine S-dioxides (5), which can be obtained by oxidation of (3) or (4), do not undergo the extrusion of sulphur dioxide.
FLUORINATED ESTROGEN RECEPTOR MODULATORS AND USES THEREOF
申请人:SERAGON PHARMACEUTICALS, INC
公开号:US20150005286A1
公开(公告)日:2015-01-01
Described herein are compounds that are estrogen receptor modulators. Also described are pharmaceutical compositions and medicaments that include the compounds described herein, as well as methods of using such estrogen receptor modulators, alone and in combination with other compounds, for treating diseases or conditions that are mediated or dependent upon estrogen receptors.