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Firstly, 2,4-dimethyl-6-tert-butylphenol is reacted with formaldehyde and HCl (Blanc reaction) to generate a chloromethyl group in the less hindered meta position. This intermediate then reacts with cyanuric acid to give the desired product.
Tris(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate is a chemical compound used as a polymer stabilizer in plastics. Like other hindered phenols it acts as a primary antioxidant. More than 1000 tonnes per year are used in the EU.
Butalbital is not recommended as a first-line treatment because it impairs alertness, brings risk of dependence and addiction, and increases the risk that episodic headaches will become chronic. [5] When other treatments are unavailable or ineffective, butalbital may be appropriate if the patient can be monitored to prevent the development of ...
Probucol, sold under the trade name Lorelco among others, is an anti-hyperlipidemic drug [1] initially developed for the treatment of coronary artery disease.Clinical use was discontinued in some countries after it was found that the drug may have the undesired effect of lowering HDL in patients with a previous history of heart disease.
Each tablet contains 2, 4, or 8 mg of the tert-butylamine salt of perindopril. Perindopril is also available under the trade name Coversyl Plus, containing 4 mg of perindopril combined with 1.25 mg indapamide, a thiazide-like diuretic. In Australia, each tablet contains 2.5, 5, or 10 mg of perindopril arginine.
The effect of the tert-butyl group on the progress of a chemical reaction is called the Thorpe–Ingold effect illustrated in the Diels-Alder reaction below. Compared to a hydrogen substituent, the tert-butyl substituent accelerates the reaction rate by a factor of 240. [2] tert-Butyl effect. The tert-butyl effect is an example of steric hindrance.
Metribuzin (4-amino-6-tert-butyl-3-(methylthio)-1,2,4-triazin-5(4H)-one) is a herbicide used both pre- and post-emergence in crops including soy bean, potatoes, tomatoes and sugar cane. It acts by inhibiting photosynthesis by disrupting photosystem II. [2] It is widely used in agriculture and has been found to contaminate groundwater. [3]