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Hydroboration–oxidation is an anti-Markovnikov reaction, with the hydroxyl group attaching to the less-substituted carbon. The reaction thus provides a more stereospecific and complementary regiochemical alternative to other hydration reactions such as acid-catalyzed addition and the oxymercuration–reduction process.
Catalyzed hydroboration-oxidation of substituted alkenes can be rendered enantioselective. In 1990, Brown and co-workers achieved asymmetric hydroboration using an achiral catalyst and chiral borane sources derived from ephedrine and pseudoephedrine. In most cases, the regioselectivity was poor although the ee values can be close to 90%. [16]
An important infectious skin disease of cats is ringworm, or dermatophytosis.Other cat skin infections include parasitic diseases like mange and lice infestations.. Other ectoparasites, including fleas and ticks, are not considered directly contagious but are acquired from an environment where other infested hosts have established the parasite's life cycle.
Lentigo in cats is a common dermatological condition characterized by the presence of small, flat, brownish spots on the skin — particularly around the lips, nose, and eyelid margins. Unlike in ...
Methylcyclopentane is an organic compound with the chemical formula CH 3 C 5 H 9.It is a colourless, flammable liquid with a faint odor. It is a component of the naphthene fraction of petroleum usually obtained as a mixture with cyclohexane.
Cyclopentene was first prepared by Carl Gärtner in 1893 from iodocyclopentane with potassium hydroxide.He named it pentamethenylene (German: Pentamethenylen). [3] ...
Information on a cat's tendency towards obsessive compulsive disorders, anxiety, fear, and over-attachment to its owner is highly advantageous for diagnosis and treatment. Wherever possible, cases of feline hyperesthesia syndrome should be referred to a specialist in feline behaviour for a secondary opinion.
Simply Pop, Coca-Cola's answer to Poppi and Olipop, is soon hitting shelves. - The Coca-Cola Company