S-Trioxane

Chloromethyl trimethylsilylmethyl sulfide, (CH,)iSiCH,SCH2Cl (1). The sulfide is obtained in 69% yield by reaction of hydrogen chloride with a mixture of trime-thylsilymethanethiol and S-trioxane at 0°. 

Reactant 7.123 can be prepared by reacting acrylonitrile with s-trioxane (Scheme 7.74) using an acid catalyst in carbon tetrachloride as solvent [147]. Two commercially available bifunctional reactants, N,N -bis(acryloyl)methylenediamine (7.133) and its water-soluble bis-quaternary precursor (7.134), have been evaluated to achieve dyeings of similar quality at lower cost. The precursor is readily converted to the active reactant at about pH 8 during... 

The S-trioxane radical cation was investigated in freon matrix and the changes of ESR spectra with temperature, arising from conformational interconversion of the ring were observed23. 

Experiments with paraformaldehyde were unsuccessful because it was found that when these additives were mixed with hydrazine perchlorate the mixture became yellow, and the consistency changed from that of the original powders to that of a dough. S-trioxane, a more stable formaldehyde polymer than paraformaldehyde, gave a less reactive mixture than paraformaldehyde, but the results were still unsatisfactory. Delrin, a stabilized formaldehyde polymer, proved even less reactive than S-trioxane. Magnesium oxide was added to hydrazine perchlorate-Delrin mixtures, on the theory that acidity in the hydrazine perchlorate might be... 

RCRA WASTE NUMBER LT 82 TRIACETALDEHYDE (FRENCH) 2,4,6-TRIMETHYL-l,3,5-TRIOXAAN PUTCH) 2,4,6-TRIMETHYL-s-TRIOXANE 2,4,6-TRI vIETHYL- ,3,5-TRIOXANE s-TRIMETHYLTRIOXY-METHYLENE 2,4,6-TRIMETIL-l,3,5-TRIOSSANO (ITALIAN)... 

Saturated heterocyclic rings containing oxygen, nitrogen, or sulfur atoms also exist preferentially in stable, chair conformations resembling that of cyclohexane. Physical measurements, such as those of electron diffraction and dipole moments, have shown this conformation for p-dioxane, -s-trioxane, ° paraldehyde, s-trithiane, and 2,4,6-trimethyl-s-tri-... 

C12H2206 triethylene glycol diglycidyl ether 1954-28-5 593.15 52.902 2 24885 C12H2403 2,4,6-tripropyl-S-trioxane 2396-43-2 517.15 45.534 2... 

Although larger oligomers than calix[8]arenes have been isolated from one-pot reactions under alkaline conditions the method of choice to obtain these higher oligomers seems to be an acid-catalysed (p-toluenesulphonic acid) condensation of 1 with s-trioxane in chloroform , where the total yield of calixarenes is nearly quantitative. Procedures to prepare a single, individual compound are not available in this case, but all t-butylcalix[n]arenes up to w = 20 have been isolated by chromatographic techniques . 

The titanium enolate of IV-propionyloxazolidinone 5.30 (R = Me) reacts highly selectively with s-trioxane at -78°C. The least hindered face of the chelate 6.89 is attacked [666, 1042] (Figure 6.77). Unexpectedly, the reaction of the boron enolate of 5.30 (R = Me, -Bu, PI1CH2) with hexafluoroacetone leads to compound 6.90, probably through an open transition state [1261] (Figure 6.77). 

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