A general entry to 2-(2-hydroxyalkyl)piperidines via iterative asymmetric dihydroxylation to cause enantiomeric enhancement
摘要:
Both enantiomers of 2-(2-propenyl)piperidine (1) (76-88% ee), prepared via the first AD of 5-hexenyl azide, underwent the second AD to provide all of the four stereoisomeric 2-(2-hydroxypropyl)-piperidines (2) with enantiomeric enhancement (>98% ee). An asymmetric synthesis, starting from 2,of several 2-(2-hydroxyalkyl)piperidine alkaloids are demonstrated. (C) 1997 Elsevier Science Ltd.
Stereoselective Synthesis of <i>anti</i>-1,3-Aminoalcohols <i>via</i> Reductive Opening of 4-Amidotetrahydropyrans Derived from the Prins/Ritter Sequence
作者:J. S. Yadav、Y. Jayasudhan Reddy、P. Adi Narayana Reddy、B. V. Subba Reddy
DOI:10.1021/ol303364j
日期:2013.2.1
A novel method has been devised for anti-1,3-aminoalcohols through reductive elimination of iodomethyltetrahydropyrans which are in turn derivedfrom a Prins/Ritter reaction sequence. The synthetic versatility of this method has been explored in the total synthesis of piperidine alkaloids and β-amino acids.
Stereoselective Synthesis of 2-(2-Hydroxyalkyl)piperidine Alkaloids Through Prins–Ritter Reaction
作者:B. V. Subba Reddy、Supriya Ghanty、N. Siva Senkar Reddy、Y. Jayasudhan Reddy、J. S. Yadav
DOI:10.1080/00397911.2013.869603
日期:2014.6.3
Abstract A stereoselective total synthesis of the 2-(2-hydroxyalkyl)piperidine alkaloids has been accomplished by a Prins–Ritter amidation sequence. Other steps involved in this synthesis are Jacobsen's hydrolytic kinetic resolution (HRK) and ring-closing metathesis (RCM). GRAPHICAL ABSTRACT
Organocatalytic stereoselective approach to the total synthesis of (−)-halosaline
作者:Vishwajeet Jha、Pradeep Kumar
DOI:10.1039/c3ra44700f
日期:——
A practical and efficient organocatalytic approach to the synthesis of substituted piperidine alkaloids in high enantio- and diastereomeric excess was achieved using proline-catalyzed sequential α-aminoxylation/α-amination reaction and HWE olefination reaction of an aldehyde.
Development and Application of a New General Method for the Asymmetric Synthesis of <i>s</i><i>yn</i>- and <i>a</i><i>nti</i>-1,3-Amino Alcohols
作者:Takuya Kochi、Tony P. Tang、Jonathan A. Ellman
DOI:10.1021/ja0363462
日期:2003.9.1
general method is described for asymmetricsynthesis of both syn- and anti-1,3-amino alcohols. The first application of metalloenamines derived from N-sulfinyl imines is reported for the highlydiastereoselectiveaddition to aldehydes. The reduction of the product beta-hydroxy N-sulfinyl imines 2 with catecholborane and LiBHEt(3) provides syn- and anti-1,3-amino alcohols with very high diastereomeric
Total synthesis of (−)-halosaline by a ruthenium-catalyzed ring rearrangement
作者:Roland Stragies、Siegfried Blechert
DOI:10.1016/s0040-4020(99)00299-9
日期:1999.7
The stereoselective synthesis of substituted piperidines by a ruthenium-catalyzed ring rearrangement of cyclopentene derivatives is demonstrated. The influence of different substituents and the effect of ethylene on the metathesis reaction is described. The ring rearrangement can be combined with a molybdenum-catalyzed crossmetathesis reaction using allyltrimethyl silane as coupling partner. The first