Results 101 to 110 of about 545 (146)
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A Seleno-Pummerer Rearrangement of Haloselenuranes
Chemistry Letters, 1988Abstract When heated or treated with triethylamine in tetrahydrofuran, diacetonyl- and diphenacylselenium dichlorides and their derivatives undergo seleno-Pummerer rearrangement to give the corresponding α-chloro selenides in good yields.
Juzo Nakayama, Yoshiaki Sugihara
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A pummerer-type rearrangement of selenides
Tetrahedron Letters, 1982Abstract A pummerer-type rearrangement has been observe in the course of the oxidation of selenides of type 1 . The main isolated product was the hemiselenoacetal 3 .
G. Galambos, V. Simonidesz
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Pummerer rearrangement of thioanhydro-hexitol sulfoxides
Tetrahedron, 1971Abstract Pummerer rearrangement of the 2,5-di-O-acetyl-1,4:3,6-bis(thioanhydro)-D-iditol-disulfoxide (1) isomers gave besides 2-acetyl-thieno-[3.2-b]thiophene (9), 2-acetyl-5-acetoxy-thieno[3.2-b]thiophene (3) as main product. These compounds can be formed only by addition of acetic anhydride to an ylide interintermediate, a fact which enables a more
J. Kuszmann, P. Sohár, Gy. Horváth
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PUMMERER REARRANGEMENTS OF ETHYL ETHYLTHIOMETHYL SULPHOXIDE
Phosphorus and Sulfur and the Related Elements, 1979Abstract Some Pummerer rearrangements, in which ethyl ethylthiomethyl sulphoxide (I) is supposed to react initially as a nucleophile, were investigated in connection with the observed decrease of basicity in this compound, due to electronic interaction between α-sulphur atom and sulphinyl group.
B. Wladislaw +3 more
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Cascades of Interrupted Pummerer Reaction‐Sigmatropic Rearrangement
The Chemical Record, 2017AbstractA new class of Pummerer chemistry has emerged as a powerful tool in organic synthesis. The new technology consists of a beautiful cascade of an interrupted Pummerer reaction and the subsequent [3,3] sigmatropic rearrangement. The interrupted Pummerer reactions of alkenyl or aryl sulfoxides with unsaturated nucleophiles such as allylic silanes ...
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Sila-pummerer rearrangements at sp2-hybridized carbon
Tetrahedron Letters, 1983Abstract α-Trimethylsilylvinyl sulfoxides undergo sila-Pummerer rearrangements upon warming in benzene. Alkynes, vinylsulfoxides, and ketene S,O-acetals are obtained as products.
David J. Hart, Yeun-Min Tsai
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An example of a tin-pummerer rearrangement
Tetrahedron Letters, 1992Abstract A highly stereoselective tin - Pummerer reaction, leading to the facile preparation of ketene O,S -acetals is described.
Roy L. Beddoes +5 more
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ChemInform Abstract: Novel Uncatalyzed Thermal Pummerer Rearrangements.
ChemInform, 1994AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
B. WLADISLAW +2 more
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Pummerer Rearrangement of Selenium-Containing Uracil Nucleosides
Nucleosides and Nucleotides, 1992Abstract Pummerer-type rearrangement of uracil nucleosides having a phenylseleno group in the 2′-, 3′-, and 5′-positions took place upon oxidation with MCPBA in CH2Cl2 followed by treatment with acid anhydrides to yield α-acyloxyselenides.
Kazuhiro Haraguchi +3 more
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On the thermal Pummerer rearrangement of substituted sulfoxides
Journal of Sulfur Chemistry, 2013Sulfoxides bearing thioester and ester groups at the α position under heating at ca. 140°C undergo Pummerer thermal rearrangement. However, for sulfonyl sulfoxide, a complex mixture of products is formed. Plausible mechanism is advanced.
Liliana Marzorati +3 more
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