- PROCESS FOR STRAIGHTENING KERATIN FIBRES WITH A HEATING MEANS AND DENATURING AGENTS
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The invention relates to a process for straightening keratin fibres, comprising: (i) a step in which a straightening composition containing at least two denaturing agents is applied to the keratin fibres, (ii) a step in which the temperature of the keratin fibres is raised, using a heating means, to a temperature of between 110 and 250° C.
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- Nitration of 2-substituted pyrimidine-4,6-diones, structure and reactivity of 5,5-gem-dinitropyrimidine-4,6-diones
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Nitration of some 2-substituted pyrimidine-4,6-diones in sulfuric acid was studied, which afforded previously unknown 5,5-gem-dinitropyrimidine-4,6-diones in high yields. The gem-dinitro products were easily attacked by nucleophiles with concomitant formation of gem-dinitroacetyl derivatives, which in turn could be further hydrolyzed to salts of dinitromethane and triureas.
- Langlet, Abraham,Latypov, Nikolaj V.,Wellmar, Ulf,Bemm, Ulf,Goede, Patrick,Bergman, Jan,Romero, Ivan
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p. 7833 - 7838
(2007/10/03)
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- Reactions of trimethylsilyl isocyanate with alcohols and phenols
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Mono-and diphenols add to trimethyl isocyanate on heating to give the corresponding aryl urethanes. Ethanol reacts with trimethylsilyl isocyanate to give ethyl urethane and ethyl allophanate in a ratio determined by reaction conditions.
- Pudovik,Krepysheva,Kharitonov,Pudovik
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p. 325 - 326
(2007/10/03)
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- Reactions of N-Sulfinyl Compounds, XV. - Synthesis of 2-Alkenesulfinic Acid Amides - Structure-Reactivity Relationships for N-Sulfinyl Compounds as Enophiles
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The reactivity of N-sulfinyl compounds R6NSO 2 in ene-reactions shows a large variation depending on the nature of the group R6.Haloalkanesulfonamide derivatives react even with very unreactive alkenes.The scope of this method for the synthesis of sulfinic acid amides and the side reactions are discussed.
- Bussas, Reinhard,Kresze, Guenter
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p. 545 - 563
(2007/10/02)
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