HFIP in organic synthesis

HF Motiwala, AM Armaly, JG Cacioppo… - Chemical …, 2022 - ACS Publications
1, 1, 1, 3, 3, 3-Hexafluoroisopropanol (HFIP) is a polar, strongly hydrogen bond-donating
solvent that has found numerous uses in organic synthesis due to its ability to stabilize ionic …

The CH Activation/1,3‐Diyne Strategy: Highly Selective Direct Synthesis of Diverse Bisheterocycles by RhIII Catalysis

DG Yu, F de Azambuja, T Gensch… - Angewandte Chemie …, 2014 - Wiley Online Library
The reactivity and selectivity of 1, 3‐diynes in transition‐metal‐catalyzed C H activation is
exploited to quickly assemble diverse polysubstituted bisheterocycles, which are highly …

Synthesis of pyrazolone fused benzodiazepines via Rh (iii)-catalyzed [4+ 3] annulation of 1-phenylpyrazolidinones with propargyl alcohols

L Zhang, Y Xu, X Zhang, X Zhang, X Fan - Organic Chemistry Frontiers, 2020 - pubs.rsc.org
In this paper, a highly efficient and regioselective synthesis of pyrazolone fused
benzodiazepine derivatives via the reaction of 1-phenylpyrazolidinones with propargyl …

Selective Synthesis of Pyrazolo[1,2-a]pyrazolones and 2-Acylindoles via Rh(III)-Catalyzed Tunable Redox-Neutral Coupling of 1-Phenylpyrazolidinones with Alkynyl …

Y Xu, M Shen, X Zhang, X Fan - Organic Letters, 2020 - ACS Publications
An unprecedented divergent synthesis of pyrazolo [1, 2-a] pyrazolones and 2-acylindoles
via Rh (III)-catalyzed [4+ 1] or [3+ 2] annulation of 1-phenylpyrazolidinones with alkynyl …

An unusual reaction mode of 1-phenylpyrazolidinones toward diazonaphthalen-2 (1 H)-ones featuring cascade C (sp 2)–H and C (sp 3)–H bond cleavage

M Wang, L Zhang, X Chen, X Zhang… - Organic Chemistry …, 2021 - pubs.rsc.org
Herein, a novel synthesis of pyrazolidinone fused 1, 3-benzooxazepine derivatives via a
formal [4+ 3] annulation reaction of 1-phenylpyrazolidinones with diazonaphthalen-2 (1H) …

Rh I/Rh III catalyst-controlled divergent aryl/heteroaryl C–H bond functionalization of picolinamides with alkynes

ÁM Martínez, J Echavarren, I Alonso, N Rodriguez… - Chemical …, 2015 - pubs.rsc.org
The ability to establish switchable site-selectivity through catalyst control in the direct
functionalization of molecules that contain distinct C–H bonds remains a demanding …

One-pot cascade synthesis of N-methoxyisoquinolinediones via Rh (iii)-catalyzed carbenoid insertion C–H activation/cyclization

J Shi, J Zhou, Y Yan, J Jia, X Liu, H Song… - Chemical …, 2015 - pubs.rsc.org
Here a new, mild and versatile method for one-pot cascade synthesis of diverse N-
methoxyisoquinolinediones via Rh (III)-catalyzed regioselective carbenoid insertion C–H …

Iridium (III)-catalyzed tandem annulation synthesis of pyrazolo [1, 2-α] cinnolines from pyrazolones and sulfoxonium ylides

CF Liu, M Liu, L Dong - The Journal of Organic Chemistry, 2018 - ACS Publications
A highly efficient iridium-catalyzed cascade annulation of pyrazolones and sulfoxonium
ylides to access various pyrazolo [1, 2-α] cinnoline derivatives has been achieved. This …

Rh(III)-Catalyzed Switchable [4 + 1] and [4 + 2] Annulation of N-Aryl Pyrazolones with Maleimides: An Access to Spiro Pyrazolo[1,2-a]indazole-pyrrolidine and Fused …

CY Lin, WW Huang, YT Huang, S Dhole… - The Journal of …, 2023 - ACS Publications
A rhodium (III)-catalyzed controllable [4+ 1] and [4+ 2] annulation of N-aryl pyrazolones with
maleimides as C1 and C2 synthon has been explored for the synthesis of spiro [pyrazolo [1 …

Selective construction of spiro or fused heterocyclic scaffolds via one-pot cascade reactions of 1-arylpyrazolidinones with maleimides

N Li, B Hu, X Zhang, X Fan - The Journal of Organic Chemistry, 2022 - ACS Publications
Presented herein is a controllable selective construction of spiro or fused heterocyclic
scaffolds through the one-pot cascade reactions of 1-phenylpyrazolidinones with …