Sulfonamides for treatment of endothelin-mediated disorders
申请人:——
公开号:US20020091270A1
公开(公告)日:2002-07-11
Thienylsulfonamides and their pharmaceutically acceptable derivatives, pharmaceutical compositions, articles of manufacture, combinations, lyophilized powders and methods for the treatment of endothelin diseases using these formulations and sulfonamides are provided. A process of preparing an alkali metal salt of a hydrophobic sulfonamide is provided. The process includes the step of dissolving a free sulfonamide in an organic solvent in the presence of a saturated alkali metal salt solution and recovering the formed sulfonamide salt from the organic phase.
Gold-Catalyzed Cycloisomerizations of 1-(2-(Tosylamino)phenyl)prop-2-yn-1-ols to 1<i>H</i>-Indole-2-carbaldehydes and (<i>E</i>)-2-(Iodomethylene)indolin-3-ols
作者:Prasath Kothandaraman、Srinivasa Reddy Mothe、Sharon Si Min Toh、Philip Wai Hong Chan
DOI:10.1021/jo201208e
日期:2011.10.7
)indolin-3-ols by gold(I)-catalyzed cycloisomerization of 1-(2-(tosylamino)phenyl)prop-2-yn-1-ols with N-iodosuccinimide (NIS) is reported. The reactions were shown to be operationally simplistic and proceed efficiently for a wide variety of substrates, affording the corresponding products in good to excellent yields (70–99%). The mechanism is suggested to involve activation of the alkyne moiety of
Gold-Catalyzed Cycloisomerization Reactions of 2-Tosylaminophenylprop-1-yn-3-ols as a Versatile Approach for Indole Synthesis
作者:Prasath Kothandaraman、Weidong Rao、Shi Jia Foo、Philip Wai Hong Chan
DOI:10.1002/anie.201000341
日期:2010.6.21
A great combination: A putative indolyl‐substituted vinyl gold species generated in situ from AuCl/AgOTf catalyzed the title transformation. Under these reaction conditions, indenyl‐fused and 2,3‐disubstituted indole derivatives were produced in good to excellent yields of up to 94 % (see scheme).
phosphoranyl radical chemistry allows for precise cleavage of a stronger C-O bond and formation of a weaker C-Cbond by 1,5-aryl migration under mild reaction conditions. This new protocol is independent of substrate redox-potential, electronic, and substituent effects. It affords a general and promising access to 60 examples of synthetically versatile o-amino and o-hydroxy diaryl ketones under redox-neutral
Complete Mapping of the Stereochemical Course of Retentive Deprotonation/Alkylation of 1<i>H</i>-Benzo[<i>e</i>][1,4]diazepin-2(3<i>H</i>)-ones
作者:Danny C. Hsu、Polo C.-H. Lam、Carla Slebodnick、Paul R. Carlier
DOI:10.1021/ja907507j
日期:2009.12.23
Enantiopure amino-acid derived 1H-benzo[e][1,4]diazepin-2(3H)-ones (BZDs) undergo highly retentive deprotonation/alkylation reactions. To confirm the role of stereolabile, axially chiral intermediates in these reactions and to determine the precise stereochemical course of deprotonation and alkylation, a new alanine-derived BZD (S)-1d was prepared. Because of slow diazepine ring inversion of the C3-alkylated