Recent advances in catalytic [3, 3]-sigmatropic rearrangements

H Lee, KT Kim, M Kim, C Kim - Catalysts, 2022 - mdpi.com
Carbon–carbon bond formation by [3, 3]-sigmatropic rearrangement is a fundamental and
powerful method that has been used to build organic molecules for a long time. Initially …

Indole-Based Macrocyclization by Metal-Catalyzed Approaches

SR Cheekatla, D Barik, G Anand, R Mol KM, M Porel - Organics, 2023 - mdpi.com
This review is dedicated to the different varieties of macrocycles synthesis bearing indole
units in their architecture by metal-catalyzed strategies. The progress of the new …

Modular Approach to Benzofurans, 2H‐Chromenes and Benzoxepines via Claisen Rearrangement and Ring‐Closing Metathesis: Access to Phenylpropanoids

S Kotha, BU Solanke - Chemistry–An Asian Journal, 2022 - Wiley Online Library
Benzofurans, 2H‐chromenes and benzoxepines are key structural elements present in
several natural products and pharmaceuticals. Here, we describe an easy‐to‐execute …

Application of ring-rearrangement metathesis in organic synthesis: A grand design

S Kotha, M Meshram, VR Aswar - Tetrahedron Letters, 2019 - Elsevier
In this report, we compiled various strategies involving a ring-rearrangement metathesis as a
key step to assemble diverse molecules. Popular name reactions such as Grignard reaction …

Electrogenerated Lewis Acid-Catalyzed Claisen Rearrangement of Allyl Aryl Ethers

Y Niki, K Mitsudo, E Sato, S Suga - Organic Letters, 2024 - ACS Publications
Catalysts for Claisen rearrangement have been intensively studied to overcome the need for
high temperature. However, previous studies have encountered challenges, such as the …

Design of molecular diversity by olefin metathesis in tandem with other reactions

S Kotha, NK Gupta, S Ansari, D Singh - Synlett, 2024 - thieme-connect.com
This review summarizes various strategies that combine metathesis with diverse named and
unnamed reactions to create molecular diversity in producing carbocycles, macrocycles, and …

Synthesis of 4-amino-5-allenylisoxazoles via gold (i)-catalysed propargyl aza-Claisen rearrangement

M Tsuda, T Morita, S Fukuhara… - Organic & Biomolecular …, 2021 - pubs.rsc.org
Propargyl aza-Claisen rearrangement of 4-propargylaminoisoxazoles 1 proceeded in the
presence of cationic gold (I) catalysts to give 4-amino-5-allenylisoxazoles 2 in good to high …

Brønsted Acid-Catalyzed, Asymmetric Allenoate Claisen Reaction

RE Hamilton, EA Berkley, IK Laufer… - The Journal of …, 2024 - ACS Publications
An auxiliary-based protocol is described for an asymmetric allenoate Claisen
rearrangement. Silicated tosic acid (10 mol%) was used as an inexpensive, user-friendly …

Synthetic Approaches to Star‐Shaped Molecules with 1, 3, 5‐Trisubstituted Aromatic Cores

S Kotha, M Meshram, NR Panguluri… - Chemistry–An Asian …, 2019 - Wiley Online Library
Herein, we summarize the synthetic approaches that have been developed for the synthesis
of star‐shaped molecules. Typically, to design such highly functionalized molecules, simple …

Synthesis of dihydrooxepinobenzofuranone derivatives via Claisen rearrangement and ring closing metathesis

SA Dinakararaja, EK Radhakrishnan - Tetrahedron Letters, 2024 - Elsevier
A simple and effective protocol for synthesizing dihydrooxepinobenzofuranone derivatives
was developed using Claisen Rearrangement (CR) and Ring Closing Metathesis (RCM) …