199456-73-0Relevant articles and documents
An umpolung oxa-[2,3] sigmatropic rearrangement employing arynes for the synthesis of functionalized enol ethers
Gaykar, Rahul N.,George, Malini,Guin, Avishek,Bhattacharjee, Subrata,Biju, Akkattu T.
supporting information, p. 3447 - 3452 (2021/05/04)
An oxa-[2,3] sigmatropic rearrangement involving arynes is reported featuring the umpolung of ketones, where the C=O bond polarity is reversed. The in situ-generated sulfur ylides from β-keto thioethers and arynes undergo efficient rearrangement allowing the facile and robust synthesis of functionalized enol ethers in high yields and excellent functional group compatibility. Preliminary mechanistic studies rule out the possibility of Pummerer-type rearrangement operating in this case.
New approach to the synthesis of dibenzodithia- and benzothiaazacrown ethers via the aromatization of 2-alkylthio(arylthio)-cyclohexanes during bromination
Kudryatsev,Samofin
, p. 106 - 111 (2007/10/03)
A new scheme for the synthesis of dibenzodithiacrown ethers is proposed based on the use of substituted phenol derivatives as intermediates, prepared by aromatization of 2-alkylthio(arylthio)cyclohexanes during bromination. 1,7-Dithia-8,9,17,18-dibenzo-18-crown-6 and 1,10-dithia-11,12,20,21-dibenzo-21-crown-7 without isomers relative to position of the sulfur atoms have been synthesized, and also new thiadiazamacroheterocycles - 1,4,7-trioxa-10,19-dithia-13,16-diaza-12,17-dioxo-8,9,14,15,20,21- tribenzoheneicosane and 1,4,7,10-tetraoxa-13,22-dithia-16,19-diaza-15,20-dioxo-11,12,17,18,23,24- tribenzotetracosane. 1997 Plenum Publishing Corporation.
