WebTraductions en contexte de "n-acetonitrile" en anglais-français avec Reverso Context : glutamic acid n, n-diacetic amide, glutamic acid n-acetic amide n-acetonitrile, alkali metal salts thereof, process to prepare them and their use WebThe calculated results show that a thiiranium ion intermediate is preferentially generated and then transformed into a chiral aza-vinylidene quinone methide (aza-VQM) …

Enantiopure thiosulfonium salts in asymmetric synthesis. Face ...

WebThe sulfenyl group can be transferred from ion 209 (R = Ph) to (E)-octene between − 20 °C and − 10 °C, resulting in the formation of new thiiranium ion 210. The formed thiiranium ions trapped by methanol afforded two products, A and B, in a 1:10 ratio (Fig. 86). This reaction did not occur below − 20 °C, however, at 0 °C rapid ... WebUpon formation, the thiiranium ion is subsequently captured in a cascade-type reaction, wherein a ketone oxygen serves as the nucleophile to open the thiiranium ion and an alcohol provides the secondary cyclization to form biorelevant spiroketals. A variety of electron-rich and electron-neutral E-substituted styrenes form the desired ... balsam used

Synthesis and Reactivity of Enantiomerically Enriched Thiiranium …

Web8 Mar 2000 · Thiiranium ion intermediates have been generated by reactions of disulfides with alkenes in the presence of oxidants such as Pb(OAc) 4 [1,2,3,4], Mn(OAc) 3 [2,3,4], … Webthiiranium ion, resulting in the corresponding acetamide.8 In fact, we had also observed what we presumed to be a Ritter side product previously, while developing an effective strategy towards catalytic asymmetric dihalogenation. During our opti-mizations, we had observed that although acetonitrile was Web25 Mar 2024 · The configurational stability, reactivity and selectivity of three-membered cationic “iranium ions” generated in situ from alkenes and their subsequent trapping by electron-rich aromatic compounds as terminating … balsam uriage