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Search results for: nucleophilic substitution
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... side products. Subsequent reactions with various nucleophiles provide access to useful functional groups including ... salts of primary amines with carbonyldiimidazole provides monosubstituted carbamoylimidazoles without the formation of symmetrical urea ...
... , intermediate ?-keto sulfones obtained via a nucleophilic substitution reaction of ?-bromoketones and sodium sulfinates ... reduced through Ru-catalyzed asymmetric transfer hydrogenation using HCOONa as a hydrogen source. This mild ...
... conditions. Preliminarily mechanistic studies suggest that nucleophilic substitution is involved in this reaction. ... article for more examples Key Words Allylboronates , Allenes , Allenylboronates ID: J54-Y2017 ...
... dibenzothiophene-forming cyclization step proceeds through a concerted nucleophilic aromatic substitution (CSNAr) mechanism. ... article for more examples Key Words C-S cleavage, C-O cleavage, metathesis, benzo-fused ...
... ] revealed that in all cases the nucleophile adds to the same face as the ... a enantioselective catalytic Mukaiyama aldol reaction of methyl-substituted siloxyfuran to derive two stereocenters. A ...
... ) the utility of the enantiomerically-pure allenic nucleophile 19, adding it to the acceptor ... acetonide 21 could be rearranged to the fully-substituted, differentially-protected tetrahydrofuran 22. Paul E ...
... Fürstner and Konetzki have reported an efficient nucleophilic substitution of triflate by acetate groups in ... derivatives in the presence of n-Bu4NOAc and ultrasound energy (Tetrahedron Lett. 1998, ...
... 0 ) efficiently catalyzes aza-Michael reactions of N-nucleophiles, such as amines and imidazoles with ... to produce the corresponding ?-amino compounds and N-substituted imidazoles in excellent yields. The recovered ...
... 7 led to a species that was nucleophilic at the ? carbon. Intramolecular alkylation ... (21), is the central highly-substituted cycloheptane ring. In his synthesis of ...
... 3 catalysis. Via this cycloisomerization/nucleophilic addition sequence, isochromene 2 was obtained ... have disclosed the microwave-assisted three-component reaction of 3-substituted 5-aminopyrazoles 1, pyruvic acid or ethyl ...
