Recent contributions from the asymmetric aza-Michael reaction to alkaloids total synthesis

Z Amara, J Caron, D Joseph - Natural Product Reports, 2013 - pubs.rsc.org
Covering: 2005 to 2013 This review focuses on recent applications of the aza-Michael
reaction in alkaloids total synthesis with a special emphasis on stereoselectivity. The report …

Recent advances in the intramolecular Mannich reaction in natural products total synthesis

Y Shi, Q Wang, S Gao - Organic Chemistry Frontiers, 2018 - pubs.rsc.org
The Mannich reaction has been widely used to effectively construct C–N and C–C bonds in
organic synthesis. This review focuses on selected applications of the intramolecular …

Transaminase triggered aza-Michael approach for the enantioselective synthesis of piperidine scaffolds

J Ryan, M Siauciulis, A Gomm, B Maciá… - Journal of the …, 2016 - ACS Publications
The expanding “toolbox” of biocatalysts opens new opportunities to redesign synthetic
strategies to target molecules by incorporating a key enzymatic step into the synthesis …

Ready Access to [5, 6, 5]-Trioxa-spiro and Fused Ketals via Ag-Catalyzed Cascade Annulation of 4-Pentyn-1-ols and Aldehydes

R Vinodkumar, AK Nakate, RK Gamidi… - Organic Letters, 2024 - ACS Publications
In this study, we unveil the versatility of 4-pentyn-1-ols as carbonyl surrogates for the
unprecedented synthesis of diverse oxygen heterocycles, including [5, 6, 5]-bis-spiroketals …

Asymmetric Intramolecular Aza-Michael Reaction in Desymmetrization Processes. Total Synthesis of Hippodamine and epi-Hippodamine

M Guerola, M Sanchez-Rosello, C Mulet… - Organic …, 2015 - ACS Publications
The use of chiral sulfinyl amines both as nucleophilic nitrogen sources and chiral inducers
has been described for the first time in a desymmetrization-type process involving an …

Multicomponent Strecker Reaction under High Pressure

K Matsumoto, JC Kim, H Iida, H Hamana… - Helvetica chimica …, 2005 - Wiley Online Library
For the first time, uncatalyzed, high‐pressure (0.6 GPa) reactions with ketones have proven
to be a powerful way to perform the three‐component Strecker synthesis of α‐amino nitriles …

Indolizidine and quinolizidine alkaloids

JP Michael - Natural Product Reports, 2007 - pubs.rsc.org
Covering: July 2004 to June 2005This review covers the isolation, structure determination,
synthesis, chemical transformations and biological activity of indolizidine and quinolizidine …

Synthesis of substituted piperidines by enantioselective desymmetrizing intramolecular aza-Michael reactions

M Guerola, M Escolano, G Alzuet-Piña… - Organic & …, 2018 - pubs.rsc.org
An organocatalytic enantioselective intramolecular aza-Michael reaction has been
described for the first time in a desymmetrization process employing substrates different from …

Aza-[3+ 3] annulations: A new unified strategy in alkaloid synthesis

G S. Buchanan, J B. Feltenberger… - Current organic …, 2010 - benthamdirect.com
An aza-[3+ 3] annulation or formal cycloaddition strategy for constructing complex
heterocycles, chiefly alkaloids, is reviewed here. This annulation involves a Knoevenagel …

Facile access to a heterocyclic, sp3-rich chemical scaffold via a tandem condensation/intramolecular nitrone–alkene [3+ 2] cycloaddition strategy

MJ Rawling, TE Storr, WA Bawazir, SJ Cully… - Chemical …, 2015 - pubs.rsc.org
A heterocyclic, sp3-rich chemical scaffold was synthesised in just 6 steps via a highly regio-
and diastereo-selective tandem nitrone formation/intramolecular nitrone–alkene [3+ 2] …