Thiocyanate, methyl

The conversion is completed by heating the reaction mixture for an additional period of 1 h at 40 °C. 

In the case of tellurophene, the organic solution is concentrated in vacuo and the remaining liquid distilled through a 40-cm Vigreux column. Tellurophene, b.p. 45 °C/20mm, nd° 1.680, is obtained in 64% yield. 

The black modification of selenium ( selenium nigrum ) reacts much less smoothly. Black tellurium powder reacts very slowly a possible explanation for this inert behaviour is that this Te, obtained by precipitation from solutions of tellurium salts, is readily inactivated by formation of oxide on the particles. 

The reaction with the elements is very vigorous and the stream of escaping ammonia together with the flow of N2 minimizes the entrance of air. Traces of oxygen cause formation of a blue to purple colour of disodium ditelluride, which persists after the sodium has reacted. 

The suspension re-appears when all ammonia has evaporated from the mixture. 

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Methyl silicate, 93 a-Methylstyrene, 93 Methyl-tert-butyl ether, 90 Methyl thiocyanate, 93 Methylthiouracil, 93 Methyltrichlorosilane, 94 Methyl vinyl ketone, 94 Methylal, 89 Metolachlor, 94 Metolcarb, 94 Metorex (Pty) Ltd., 199 Metribuzin, 94 Metronidazole, 94 Mevinphos, 94 Mexacarbate, 94... 

Rhodan-ion, n. thiocyanogen ion, CNS -kali, -kalium, n, potassium thiocyanate, -kalzium, n. calcium thiocyanate, -kupfer, n. cupric thiocyanate, copper(II) thiocyanate. -iSsung, /. thiocyanate solution, -metall, n. (metallic) thiocyanate, -methyl, n. methyl thiocyanate, -natrium, n, sodium thiocyanate, -nickel, m. nickel thiocyanate, -quecksilber, n. mercury thiocyanate, -salz, n. thiocyanate, -sdure, /. (Org. Chem.) thiocyan(at)o acid, -tonerde, /. aluminum thiocyanate. 

Reaction of 1-tetralone with aryl cyanides or methyl thiocyanate, followed by aromatisation with DDQ gave good yields of benzoquinazolines. The further transformation of the methylthio product 31, via oxidation and selective sequential nucleophilic substitution of the resulting sulfones, illustrates the utility of this substituent. 2-Tetralone reacted similarly but substantial amounts of by-products were formed <06T2799>. 

In this case, the acidic species RCOX is a hard acid and reacts with the nitrogen end of SCN to form an acyl isothiocyanate. The soft methyl group bonds to the S atom and forms methyl thiocyanate. Consider the reactions of NC)2 ... 

Compound (XIII) exists as a mixture of monomeric and dimeric species at room temperature. The same situation is true for the reaction products from methyl- and isopropyl-thiocyanate, respectively, with triisopropylborane, whereas the iminoborane obtained from reacting methyl-thiocyanate with tri-n-butylborane is dimeric 3 . With the exception of (XIII) these compounds have not been characterized by analysis. 

When ketones 713 are used in the same reaction in place of the ester, tri- or tetralkylalkylpyrimidines are obtained, and when methyl thiocyanate is used in place of the nitrile, 2,4- or 2,6-bis(methylthio)pyrimidines 714 are obtained... 

The edible portion of broccoli Brassica oleracea var. italica) is the inflorescence, and it is normally eaten cooked, with the main meal. Over 40 volatile compounds have been identified from raw or cooked broccoli. The most influential aroma compounds found in broccoli are sulfides, isothiocyanates, aliphatic aldehydes, alcohols and aromatic compounds [35, 166-169]. Broccoli is mainly characterised by sulfurous aroma compounds, which are formed from gluco-sinolates and amino acid precursors (Sects. 7.2.2, 7.2.3) [170-173]. The strong off-odours produced by broccoli have mainly been associated with volatile sulfur compounds, such as methanethiol, hydrogen sulfide, dimethyl disulfide and trimethyl disulfide [169,171, 174, 175]. Other volatile compounds that also have been reported as important to broccoli aroma and odour are dimethyl sulfide, hexanal, (Z)-3-hexen-l-ol, nonanal, ethanol, methyl thiocyanate, butyl isothiocyanate, 2-methylbutyl isothiocyanate and 3-isopropyl-2-methoxypyrazine... 

Methanesulfonyl chloride has been prepared by the chlorination of methyl thiocyanate, S-methylthiourethan, sodium methyl thiosulfate or S-methylisothiuronium sulfate from sodium methanesulfonate by the action of phosphorus penta-chloride, phosphorus oxychloride, or benzotrichloride from methanesulfonic acid by the action of phosphorus pentachloride or by the reaction of methylmagnesium iodide with sulfuryl chloride. ... 

Methyl isothiocyanate has been prepared from methyl thiocyanate by rearrangement with heat1 and from A, A /-dimethyl-thiuramdisulfide by the action of iodine 2 or by heating with water or alcohol.3 The most useful method of preparation has been the reaction of methylamine with carbon disulfide to form methyl-... 

However, the reaction of the binuclear rj2-thioaldehyde titanocene complexes 112 (see Scheme 26) with valeronitrile, benzonitrile, and methyl thiocyanate proceeded in a similar fashion (Scheme 39).69 Related metalla-cyclic compounds were also obtained from the reactions of 112 with benzo-phenone (Scheme 39), various imines, phenyl isothiocyanate, or dicyclohexyl carbodiimide via insertion of the C = 0 and C = N bond, respectively, into the Ti-C bond.69,70... 

CH3CNS (g). The data of Thomsen16 on the heat of combustion of gaseous methyl thiocyanate yield, for CH3CNS (g), Qf=— 36.2. 

The, S n2 reaction between lithium isothiocyanate ion pair and methyl fluoride has been calculated at the MP2(full)/6-31H-G //HF/6-311- -G level of theory in the gas phase and in acetone using the PCM model.108 Both the gas phase and acetone reactions occur with inversion, rather than retention, of configuration. However, the transition states and products are different in the gas phase and in solution methyl thiocyanate is formed in the gas phase by transition state (72) whereas methyl isothiocyanate is formed much more slowly in acetone via the looser transition state (73). 

Figure 4-47. A cobalt-mediated reaction of methyl thiocyanate.

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