[EN] 5-MEMBERED HETEROARYLAMINOSULFONAMIDES FOR TREATING CONDITIONS MEDIATED BY DEFICIENT CFTR ACTIVITY [FR] HÉTÉROARYLAMINOSULFONAMIDES À 5 CHAÎNONS POUR LE TRAITEMENT D'ÉTATS À MÉDIATION PAR UNE ACTIVITÉ CFTR DÉFICIENTE
Rhodium‐Catalyzed Cyclization of Terminal and Internal Allenols: An Atom Economic and Highly Stereoselective Access Towards Tetrahydropyrans
作者:Johannes P. Schmidt、Bernhard Breit
DOI:10.1002/ange.202009166
日期:2020.12.21
AbstractA comprehensive study of a diastereoselective Rh‐catalyzedcyclization of terminal and internalallenols is reported. The methodology allows the atomeconomic and highly syn‐selective access to synthetically important 2,4‐disubstituted and 2,4,6‐trisubstituted tetrahydropyrans (THP). Furthermore, its utility and versatility are demonstrated by a great functional‐group compatibility and the
Stereoselective Reaction of α-Sulfinyl Carbanion Derived from Chiral 2-(Trialkylsilyl)ethyl Sulfoxides: Evidence for a Novel Silicon−Oxygen Interaction
Reactions of alpha-sulfinyl carbanions, derivedfrom p-tolyl sulfoxides bearing various alkyl groups, with various electrophiles were examined. The reaction of alpha-sulfinyl carbanions, derivedfrom the beta-silylethyl sulfoxides, with ketones or trimethyl phosphate, gave the syn products with high stereoselectivity. Interaction between the silicon in the trialkylsilyl group and the carbonyl oxygen
Cyclometalation of dialkylbis(triethylphosphine)platinum(II) complexes: formation of Pt,Pt-bis(triethylphosphine)platinacycloalkanes
作者:Robert DiCosimo、Stephen S. Moore、Allan F. Sowinski、George M. Whitesides
DOI:10.1021/ja00365a024
日期:1982.1
activation for reactions which form fourand five-membered platinacycloalkanes is small (AAG| 4 kcal mol-'); that for reactions which form fourand six-membered rings is smaller (AAG+ 0 kcal mol-t). We identify these values of AAG+ with estimates of the strain energies of these rings, assuming the strain energy of the platinacyclohexane is small. The important conclusion from these studies is that the strain energy
Iridium-Catalyzed Regioselective Silylation of Secondary Alkyl C–H Bonds for the Synthesis of 1,3-Diols
作者:Bijie Li、Matthias Driess、John F. Hartwig
DOI:10.1021/ja5026479
日期:2014.5.7
Ir-catalyzed intramolecular silylation of secondary alkyl C-H bonds. (Hydrido)silyl ethers, generated in situ by dehydrogenative coupling of a tertiary or conformationally restricted secondary alcohol with diethylsilane, undergo regioselective silylation at a secondary C-H bond γ to the hydroxyl group. Oxidation of the resulting oxasilolanes in the same vessel generates 1,3-diols. This method provides a strategy