Herein, the deprotonative functionalization of pyridine derivatives with aldehydes under ambient conditions has been demonstrated using an amide base generated in situ from a catalytic amount of CsF and a stoichiometric amount of tris(trimethylsilyl)amine (N(TMS)3). Pyridine substrates bearing two electron-withdrawing substituents (i.e., fluoro, chloro, bromo, and trifluoromethyl moieties) at the 3-
A New Strategy for Deprotonative Functionalization of Aromatics: Transformations with Excellent Chemoselectivity and Unique Regioselectivities Using <i>t</i>-Bu-P4 Base
作者:Tatsushi Imahori、Yoshinori Kondo
DOI:10.1021/ja0342300
日期:2003.7.1
A new strategy for deprotonative functionalization of aromatics using t-Bu-P4 base has been developed, and highly chemoselective transformations have been achieved with unique regioselectivities.
Scalable and Straightforward Synthesis of All Isomeric (Cyclo)alkylpiperidines
作者:Andrii I. Subota、Anton O. Lutsenko、Bohdan V. Vashchenko、Dmitriy M. Volochnyuk、Vitalina Levchenko、Yurii V. Dmytriv、Eduard B. Rusanov、Alina O. Gorlova、Sergey V. Ryabukhin、Oleksandr O. Grygorenko
DOI:10.1002/ejoc.201900450
日期:2019.6.16
C‐3, or C‐4 positions of the piperidine ring based on the formal sp3–sp3 retrosynthetic disconnection is described. Catalytic hydrogenation of these adducts could be performed selectively for the synthesis of (cyclo)alkylpiperidines or the corresponding saturated amino alcohols on up to a 0.5 kg scale.