1,3-Dipole mit zentralem S-Atom aus der Umsetzung von Aziden mit Thiocarbonyl-Verbindungen: Eine unerwartete MeS-Wanderung im Abfangprodukt eines ?Thiocarbonyl-aminids? mit Dithiobenzoes�ure-methylester
1,3-Dipoles with a Central S-Atom from the Reaction of Azides and Thiocarbonyl Compounds: An Unexpected MeS Migration in the Trapping Product of a ‘Thiocarbonyl-aminide’ with Methyl Dithiobenzoate
Ambiguous Reactivity of a Fluorinated Thiocarbonyl S -Imide; Unprecedented Rearrangement under FVP Conditions
作者:Grzegorz Mlostoñ、Stanisław Leśniak、Anthony Linden、Herbert W Roesky
DOI:10.1016/s0040-4020(00)00348-3
日期:2000.6
pyrolysis (FVP) of the N-(adamantan-1-yl)hexafluorothioacetone S-imide (1b) yielded an isomeric compound 4 without extrusion of the sulfur atom. On the other hand, thermolysis of the same S-imide in CDCl3-solution afforded dithiazolidine 5 as the main product. Thermal cleavage of 1b leading to in situ formation of hexafluorothioacetone is the primary reaction in solution. [3+2]-Cycloadditions of 1b
Bildung von 1,2,4-Trithiolanen in Dreikomponenten-Gemischen aus Phenyl-azid, aromatischen Thioketonen und 2,2,4,4-Tetramethylcyclobutanthionen: Eine Schwefel-Transfer-Reaktion unter Bildung von ?Thiocarbonylthiolaten? ((Alkylidensulfonio)thiolaten) als reaktive Zwischenstufen
作者:Grzegorz Mlosto?、Heinz Heimgartner
DOI:10.1002/hlca.19950780520
日期:1995.8.9
Formation of 1,2,4-Trithiolanes in Three-Component Reactions of Phenyl Azide, Aromatic Thiones, and 2,2,4,4-Tetramethylcyclobutanethiones: A Sulfur-Transfer Reaction to ‘Thiocarbonyl-thiolates’ ((Alkylidenesulfonio)-thiolates) as Reactive Intermediates
In order to trap ‘thiocarbonyl-aminides’ A, formed as intermediates in the reaction of thiocarbonyl compounds with phenylazide, a mixture of 2,2,4,4-tetramethyl-3-thioxocyclobutanone (1), phenylazide, and fumarodinitrile (8) was heated to 80° until evolution of N2 ceased. Two interception products of the ‘thiocarbonylaminide’ A (ArPh) were formed: the known 1,4,2-dithiazolidine 3 (cf. Scheme 1) and
Synthesis of hetaryl-substituted 1,2,4-trithiolanes via a three-component reaction with dihetaryl thioketones, benzyl azide, and 2,2,4,4-tetramethyl-3-thioxocyclobutanone
The three-component reactions with a hetaryl thioketone, 2,2,4,4-tetramethyl-3-thioxocyclobutanone, and excess benzyl azide performed at 60 degrees C in the presence of LiClO4 lead to the formation of two types of 1,2,4-trithiolanes. As the major products, the non-symmetrical dihetaryl-substituted spiro-1,2,4-trithiolanes are formed. In addition, the symmetrical dispiro-1,2,4-trithiolane is identified. These products are formed in competitive [3 + 2] cycloadditions of the in-situ-generated thiocarbonyl S-sulfide with the thioketones used in the reaction.[GRAPHICS].