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The first to investigate trifluoromethyl groups in relationship to biological activity was F. Lehmann in 1927. [5] An early review appeared in 1958. [6] An early synthetic method was developed by Frédéric Swarts in 1892, [7] based on antimony fluoride.
Trifluoracetone is also used in a synthesis of 2-trifluoromethyl-7-azaindoles starting with 2,6-dihalopyridines. The derived chiral imine is used to prepare enantiopure α-trifluoromethyl alanines and diamines by a Strecker reaction followed by either nitrile hydrolysis or reduction.
Trifluoromethyltrimethylsilane (known as Ruppert-Prakash reagent, TMSCF 3) is an organosilicon compound with the formula CF 3 Si(CH 3) 3.It is a colorless liquid. The compound is a reagent used in organic chemistry for the introduction of the trifluoromethyl group.
The texture of topical gels is less greasy as it contains a higher proportion of water compared with cream and ointment. [ 3 ] [ 1 ] [ 2 ] [ 8 ] These gels have an excellent spreading property and cooling effect due to solvent evaporation, and also has a higher retention time on the skin.
It is also referred to as perfluoromethanol or trifluoromethyl alcohol. The compound is the simplest perfluoroalcohol . [ 2 ] The substance is a colorless gas, which is unstable at room temperature.
Cream. A cream is a preparation usually for application to the skin.Creams for application to mucous membranes such as those of the rectum or vagina are also used. Creams may be considered pharmaceutical products, since even cosmetic creams are manufactured using techniques developed by pharmacy and unmedicated creams are highly used in a variety of skin conditions (dermatoses).
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