175154-68-4Relevant academic research and scientific papers
Lewis Acid-Catalyzed Vinyl Acetal Rearrangement of 4,5-Dihydro-1,3-dioxepines: Stereoselective Synthesis of cis- And trans-2,3-Disubstituted Tetrahydrofurans
Ghosh, Arun K.,Belcher, Miranda R.
, p. 10399 - 10412 (2020/09/02)
Lewis acid-catalyzed rearrangements of 4,5-dihydro-1,3-dioxepines have been investigated. Rearrangement of vinyl acetals under a variety of conditions resulted in cis- and trans-2,3-disubstituted tetrahydrofuran derivatives in a highly stereoselective man
Catalytic Asymmetric Vinylogous Prins Cyclization: A Highly Diastereo- and Enantioselective Entry to Tetrahydrofurans
Xie, Youwei,Cheng, Gui-Juan,Lee, Sunggi,Kaib, Philip S.J.,Thiel, Walter,List, Benjamin
supporting information, p. 14538 - 14541 (2016/11/18)
We describe the design and development of the first catalytic asymmetric vinylogous Prins cyclization. This reaction constitutes an efficient approach for highly diastereo- and enantioselective synthesis of tetrahydrofurans (THFs) and is catalyzed by a confined chiral imidodiphosphoric acid (IDP). Aromatic and heteroaromatic aldehydes react with various 3,5-dien-1-ols to afford 2,3-disubstituted THFs in excellent selectivity (d.r. > 20:1, e.r. up to 99:1). Aliphatic aldehydes react with similarly excellent results when a highly acidic imidodiphosphorimidate (IDPi) catalyst is used. With a racemic dienyl alcohol, the reaction proceeds via a kinetic resolution. DFT calculations suggest an explanation for unusually high stereoselectivity.
New access to carbonyl ylides by the silicon-based 1,3-elimination and their [3 + 2] cycloadditions to activated alkenes and alkynes: One-step synthesis of dihydrofurans and tetrahydrofurans
Hojo, Makoto,Ohkuma, Masakazu,Ishibashi, Naruyasu,Hosomi, Akira
, p. 5943 - 5946 (2007/10/02)
Simple aryl-substituted carbonyl ylides are generated by the silicon-based 1,3-elimination of chloromethyl trimethylsilyl(α-aryl)methyl ethers promoted by flouride ion under mild and neutral conditions which provide an one-step synthesis of dihydrofurans
