palladium‐catalyzed C(sp3)−H activation that enables the directalkynylation of free carboxylic acid substrates. In contrast to previous synthetic methods, no introduction/removal of an exogenous directing group is required. A broad scope of acids including both α‐quaternary and challenging α‐non‐quaternary can be used as substrates. Additionally, the alkynylation in the distal γ‐position is reported. Finally
Compounds of the present invention, and pharmaceutically acceptable compositions thereof, are useful as modulators of ATP-Binding Cassette (“ABC”) transporters or fragments thereof, including Cystic Fibrosis Transmembrane Conductance Regulator (“CFTR”). The present invention also relates to methods of treating ABC transporter mediated diseases using compounds of the present invention.
Metal-free synthesis of activated ynesulfonamides and tertiary enesulfonamides
作者:Lucile Andna、Laurence Miesch
DOI:10.1039/c9ob00947g
日期:——
An operationally simple synthesis of activated ynesulfonamides and enesulfonamides is described. Ynesulfonamides can be obtained through reaction of sulfonylamides with activated bromoalkynes and Triton B in a short time at room temperature. Likewise, terminal alkynes react with sulfonylamides to provide enesulfonamides. Z/E enesulfonamides can be transformed exclusively into E enesulfonamides.
2-(N-alkyl-2-imidazolin-2-yl)benzophenones and process for their
申请人:American Home Products Corporation
公开号:US03931218A1
公开(公告)日:1976-01-06
2-(N-alkyl-2-imidazolin-2-yl)-benzophenones are prepared by reaction of the .psi.-acid chloride of an o-aroyl benzoic acid with an N.sup.1 -alkyl-N.sup.2 -tosyl diamine and heating the resulting benzoyl benzamide product with sulfuric acid. The compounds demonstrate hypoglycemic antireserpine, antiulcerogenic or antiarrhythmic activity.