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Radical cyclisation proceeds via specific mechanisms to form the hydroazulene core.
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SUPPORTED
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Retrieved chemical literature and academic discussions detail the preparation of the hydroazulene core through specific radical cyclisation pathways, such as radical-induced processes starting from cyclopentanone derivatives.

Evidence for · 1
Mechanism of radical cyclisation to form hydroazulene core
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# Mechanism of radical cyclisation to form hydroazulene core - Tags: organic-chemistry, reaction-mechanism, carbonyl-compounds, radicals - Score: 11 - Views: 491 - Answers: 1 - Asked by: Suraj S (1,234 rep) - Asked on: May 6, 2017 - Last active: Sep 11, 2018 - License: CC BY-SA 4.0 --- ## Question > Recent studies on radical-induced cyclisation reactions have led to a simple, one-step method for the preparation of hydroazulenes from appropriately substituted cyclopentanone precursors. Treatment of **1**, for example, with triphenyltin hydride and AIBN in refluxing toluene gave **2** in 79% yield. Give a mechanism for this transformation. (TES = triethylsilyl, SiEt3) > > ![Radical cyclisation of 2-(2,2-dimethylpent-4-yn-1-yl)-2-((triethylsilyl)oxy)cyclopentan-1-one to 2,2-dimethyl-8a-((triethylsilyl)oxy)-2,3,6,7,8,8a-hexahydroazulen-5(1H)-one](https://i.sstatic.net/soCgV.png) > > (taken from: McKillop, A. [_Advanced Problems in Organic Reaction Mechanisms;_](https://www.elsevier.com/books/advanced-problems-in-organic-reaction-mechanisms/mckillop/978-0-08-043256-4) Tetrahedron Organic Chemistry Series, Vol. 16; Pergamon Press: Oxford, U.K., 1997; p 1.) I know that triphenyltin
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rails:sufficiency:supported:single_source:for=1+0p:against=0+0p | v55:sufficiency

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