Cyclisation reactions involving alkyl enol ethers

L Lempenauer, G Lemière… - Advanced Synthesis & …, 2019 - Wiley Online Library
Enol ethers are a fascinating product class and valuable building blocks with versatile
reactivities and synthetic applications. With the emergence of silyl enol ethers, the chemistry …

New Avenues for the Synthesis of Oxa‐Cycles Using Lewis/Brønsted Acid Mediated Carboxygenation and Carboalkoxylation of Alkynes

SK Nanda, LN Nanda, J Pal… - European Journal of …, 2024 - Wiley Online Library
The cascade functionalizations of alkynes have provided many elegant methods for the
synthesis of useful scaffolds. Amongst these functionalizations, the ones comprising C− C …

Catalytic asymmetric vinylogous Prins cyclization: a highly diastereo-and enantioselective entry to tetrahydrofurans

Y **e, GJ Cheng, S Lee, PSJ Kaib… - Journal of the …, 2016 - ACS Publications
We describe the design and development of the first catalytic asymmetric vinylogous Prins
cyclization. This reaction constitutes an efficient approach for highly diastereo-and …

Regio- and Stereoselective Pd-Catalyzed Direct Arylation of Unactivated sp3 C(3)–H Bonds of Tetrahydrofuran and 1,4-Benzodioxane Systems

R Parella, SA Babu - The Journal of Organic Chemistry, 2015 - ACS Publications
An auxiliary-enabled Pd-catalyzed highly regio-and stereoselective sp3 C–H activation and
the direct arylation of the C3-position of oxygen heterocycles, such as tetrahydrofuran and 1 …

Stereoselective Synthesis of Pyrroloisoindolone and Pyridoisoindolone via aza-Prins Cyclization of Endocyclic N-Acyliminium Ions

M Das, AK Saikia - The Journal of organic chemistry, 2018 - ACS Publications
A simple methodology has been developed for the synthesis of substituted
pyrroloisoindolone and pyridoisoindolone via aza-Prins cyclization of endocyclic N …

Synthesis of Indenes by a BF3·OEt2-Mediated, One-Pot Reaction of Aryl Homopropargyl Alcohols, Aldehydes, and Arenes

T Kotipalli, DR Hou - Organic Letters, 2018 - ACS Publications
A new and efficient protocol to prepare indenes is reported. Assisted by boron trifluoride
diethyl etherate, the one-pot reaction of aryl homopropargyl alcohols and aldehydes in the …

Transposition of an acrylate moiety in TMSOTf-mediated reaction of alkynyl vinylogous carbonates gives heterocyclic dienes

SJ Gharpure, DJ Fartade, KS Gupta… - Chemical …, 2022 - pubs.rsc.org
TMSOTf-mediated reaction of alkynyl vinylogous carbonates serendipitously gave 1, 4-
oxazepine and dihydropyran dienes via transposition of an ethyl acrylate moiety involving …

Recent advances in prins spirocyclization

BV Subba Reddy, PN Nair, A Antony… - European Journal of …, 2017 - Wiley Online Library
The classical Prins cyclization has been one of the most intensively studied reactions during
the last two decades, and it has found many applications in key steps of natural product …

Synthesis of heterocyclic scaffolds via prins, oxonium-ene and related cyclization reactions

AK Saikia - Synlett, 2023 - thieme-connect.com
A variety of oxygen, nitrogen and sulfur heterocyclic compounds are synthesized via one-pot
multicomponent Prins, aza-Prins, thia-Prins, oxonium-ene, iminium-ene and thionium-ene …

Copper‐Catalyzed Diastereoselective Synthesis of Trifluoromethylated Tetrahydrofurans

Y Wang, M Jiang, JT Liu - Advanced Synthesis & Catalysis, 2016 - Wiley Online Library
The copper‐catalyzed intramolecular diastereoselective trifluoromethylcycloetherification of
homoallylic alcohols with Togni's reagent as trifluoromethylating reagent was realized under …