- Direct N-Alkylation and Kemp Elimination Reactions of 1-Sulfonyl-1H-Indazoles
-
The reactions of 1-sulfonyl-1H-indazoles under basic conditions are discussed, and the direct N-alkylation and Kemp elimination reactions of these compounds are reported. A series of 2-(p-tosylamino)benzonitriles and N-alkyl indazoles were prepared in good yields. Moreover, the 2-(p-tosylamino)benzonitriles could be transformed into a diverse range of important derivatives in a one-pot reaction. This method was successfully applied to the total syntheses of quindolinone and cryptolepinone; quindolinone was prepared in a one-pot reaction from 1-sulfonyl-1H-indazole.
- Tang, Meng,Chu, Bingjie,Chang, Xiaowei
-
p. 2109 - 2116
(2018/07/31)
-
- Mild hypervalent iodine mediated oxidative nitration of N-aryl sulfonamides
-
An oxidative and acid-free method for the nitration of N-aryl sulfonamides has been developed using a combination of sodium nitrite as cheap and easy to handle NO2-source and the hypervalent iodine reagent PIFA as stoichiometric oxidant. Under
- Kloeckner, Ulrich,Nachtsheim, Boris J.
-
supporting information
p. 10485 - 10487
(2014/09/29)
-
- PYRROLOPYRIMIDINES AS FAK AND ALK INHIBITERS FOR TREATMENT OF CANCERS AND OTHER DISEASES
-
Disclosed are compounds which inhibit the activity of focal adhesion kinase (FAK) and anaplastic lymphoma kinase (ALK), compositions containing the compounds, and methods of treating diseases during which FAK and ALK are expressed. The diseases are, for example, cancers.
- -
-
Page/Page column 90-91
(2012/04/23)
-
- SULFONYL AMIDE DERIVATIVES FOR THE TREATMENT OF ABNORMAL CELL GROWTH
-
The present invention relates to a compound of the formula I wherein R1 to R6, A, B, n and m are as defined herein. Such novel sulfonyl amide derivatives are useful in the treatment of abnormal cell growth, such as cancer, in mammals. This invention also relates to a method of using such compounds in the treatment of abnormal cell growth in mammals, especially humans, and to pharmaceutical compositions containing such compounds.
- -
-
Page/Page column 38
(2009/04/24)
-
- β-cyclodextrin-catalyzed monosulfonylation of amines and amino acids in water
-
A mild and efficient procedure has been developed for the first time under biomimetic conditions for the monosulfonylation of various amines and amino acids catalyzed by β-cyclodextrin in water at room temperature to afford the corresponding sulfonamides in high yields.
- Sridhar,Srinivas,Kumar, V. Pavan,Narender,Rao, K. Rama
-
p. 1873 - 1876
(2008/09/16)
-
- The CSIC [carbanion mediated sulfonate (sulfonamido) intramolecular cyclization] reaction: Scope and limitations
-
The CSIC (Carbanion-mediated Sulfonate-Sulfonamide-Intramolecular Cyclization) reaction has been extended to new carbonyl containing substrates, showing the scope and limitations of this process. Suitable derivatives of ketones (e.g acetophenone (1)), β-keto esters (e.g ethyl acetoacetate (4)), γ-keto esters (e.g ethyl 2-oxocyclohexaneacetate (5) and ethyl levulinate (6)) proved reluctant to undergo this protocol. Cyclopropyl methyl ketone (2) gave the heterocycle (3), only in the 'sulfonamide' synthetic sequence of the CSIC reaction. Cyclic azaketones (e.g tropinone (7)) fated also, but 4-piperidones (9, 10) afforded the novel 3,8- disubstituted 4-amino-8-aza-1-oxa-2-thiaspiro[4.5]dec-3-ene 2,2-dioxide (12, 15a-c) and 8-substituted 4-amino-1,8-diaza-2-thiaspiro[4.5]dec-3-ene 2,2- dioxide (18a, 18b, 21a, 21b) ring systems; the former compounds are the first examples of such ring systems substituted at the 3-position, whereas the latter represent the first ever representatives of spiro fused systems containing the 4-amino-2,3-dihydroisothiazole 1,1-dioxide moiety. Base promoted (NaH or DBU) cyclization of precursors 11b, 14a-c, 17b, 17c and 20 give the final adducts in good overall yield. Finally, we were unsuccessful with some conveniently functionalized anthranilonitrile derivatives (8a-d), in an attempt to extend the CSIC reaction to β-aminonitriles. As a result of these studies the substrate dependent reactivity in the CSIC reaction has been analyzed in depth and some restrictions and limitations have been observed and discussed.
- Marco, Jose L.,Ingate,Chinchon
-
p. 7625 - 7644
(2007/10/03)
-
- Selective monodesulfonylation of N,N-disulfonylarylamines with tetrabutylammonium fluoride
-
The monodesulfonylation reaction of N,N-bis(methylsulfonyl)-, N,N- bis(phenylsulfonyl)-, and N,N-bis(p-tolylsulfonyl)arylamines easily proceeded using tetrabutylammonium fluoride in tetrahydrofuran under mild conditions to give the corresponding N-monosulfonylarylamines in excellent yields.
- Yasuhara, Akito,Kameda, Mitsuyoshi,Sakamoto, Takao
-
p. 809 - 812
(2007/10/03)
-
