Catalytic Enantioselective Synthesis of 3-Piperidines from Arylboronic Acids and Pyridine
作者:Sourabh Mishra、Sedef Karabiyikoglu、Stephen P. Fletcher
DOI:10.1021/jacs.3c05044
日期:2023.7.5
cross-coupling approach to enantioenriched 3-piperidines from pyridine- and sp2-hybridized boronic acids. The key step involves a Rh-catalyzed asymmetric reductive Heck reaction of aryl, heteroaryl, or vinyl boronic acids and phenyl pyridine-1(2H)-carboxylate to provide 3-substituted tetrahydropyridines in high yield and excellent enantioselectivity with a wide functional group tolerance. A three-step
Amino-oxetanes as amide isosteres by an alternative defluorosulfonylative coupling of sulfonyl fluorides
作者:Juan J. Rojas、Rosemary A. Croft、Alistair J. Sterling、Edward L. Briggs、Daniele Antermite、Daniel C. Schmitt、Luka Blagojevic、Peter Haycock、Andrew J. P. White、Fernanda Duarte、Chulho Choi、James J. Mousseau、James A. Bull
DOI:10.1038/s41557-021-00856-2
日期:2022.2
This disconnection, comparable to a typical amidation, will allow the application of vast existing amine libraries. The reaction is tolerant to a wide range of polar functionalities and is suitable for array formats. Ten oxetane analogues of bioactive benzamides and marketed drugs are prepared. Kinetic and computational studies support the formation of an oxetane carbocation as the rate-determining
Asymmetric Synthesis of Chiral<i>N</i>-Sulfinyl 3-Alkyl- and 3-Arylpiperidines by α-Alkylation of<i>N</i>-Sulfinyl Imidates with 1-Chloro-3-iodopropane
作者:Filip Colpaert、Sven Mangelinckx、Norbert De Kimpe
DOI:10.1021/jo1020807
日期:2011.1.7
l-5-chloropentylamines, which could be cyclized to a range of new chiral 3-substituted N-tert-butanesulfinylpiperidines using NaH in DMSO. Finally, the N-tert-butanesulfinylpiperidines could be efficiently deprotected to enantiomerically pure 3-alkyl- and 3-arylpiperidine hydrochlorides.