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Search results for: nucleophilic substitution
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... 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 ...
... ] 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 ...
... 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 ...
... of a nitrile 8 was a powerful nucleophile, smoothly opening an epoxide 10 to ... ) an elegant Wittig-Schlosser approach to geometrically-defined trisubstituted alkenes. Jianbo Wang of Peking University ...
... 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, ...
... MIT described a related allene preparation using nucleophilic hydride (not illustrated) (J ... Zhong of Hangzhou Normal University prepared the trisubstituted alkene 26 via the oxidative coupling of ...
... the 2' azide functionality was introduced by nucleophilic displacement. The displacement and subsequent intramolecular ... Synthesis of Benzoxazoles The synthesis of highly substituted benzoxazoles employing solid-supported reagents was developed by ...
... 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 ...
... was discriminating enough to target the more nucleophilic C-H bond, leading to the cyclohexanone ... prochiral dienone 18 to give the highly substituted cyclohexenone 19. Ping Tian and Guo-Qiang ...
... Sharpless-derived epoxides such as 12 with vinyl nucleophiles was unexpectedly flexible. One set of ... rice fungus Ophiobolus miyabeanus, is the highly-substituted eight-membered ring. A key step in ...
