We have learned that alcohols are versatile reactive species because they act both as nucleophiles and electrophiles. When they are used as electrophiles, the OH group is substituted with a nucleophile, and for this to happen, we need to first … Read more
PCl₅ is one of several reagents we have seen that are used for converting alcohols to alkyl halides: Notice that in the case of chiral secondary alcohols, there is inversion of configuration, which indicates that substitution at the … Read more
In the previous post, we discussed different methods for converting alcohols to alkyl halides, including their reaction with hydrohalic acids, the use of mesylates and tosylates, as well as reagents such as thionyl chloride (SOCl2) and phosphorus tribromide (PBr3). … Read more
Tamoxifen is a selective estrogen receptor modulator (SERM) widely used in the treatment and prevention of estrogen receptor–positive breast cancer. Structurally, it is a triphenylethylene derivative, consisting of a substituted alkene framework connecting three aromatic rings, along with a basic side chain. … Read more
Hydroxyzine is a first-generation antihistamine widely used in the treatment of anxiety, nausea, and allergic conditions. It belongs to a class of drugs characterized by a piperazine ring connected to a substituted phenyl group and a hydroxyethyl side chain. Hydroxyzine … Read more
Risperidone is an atypical antipsychotic medication widely used in the treatment of schizophrenia, bipolar disorder, and irritability associated with autism spectrum disorder. It belongs to a class of drugs known as second-generation antipsychotics, which act primarily by modulating dopamine (D₂) … Read more
Phenol is the simplest member of this family of compounds. It consists of a benzene ring bearing a single hydroxyl group, and many important aromatic compounds can be viewed as derivatives of phenol. As more hydroxyl groups are introduced onto … Read more
Miconazole, an antifungal medication belonging to the azole class and specifically the imidazole subclass, is used to treat a variety of superficial fungal infections, including ringworm, athlete’s foot, jock itch, and yeast infections of the skin or vagina. It is … Read more
Loperamide is an antidiarrheal medication best known under the brand name Imodium. It works by activating μ-opioid receptors in the intestinal tract, which slows down gut movement and reduces the frequency of bowel movements. Unlike other opioids, Loperamide does not … Read more
Ibuprofen, the active ingredient in brands such as Advil, is a widely used non-steroidal anti-inflammatory drug (NSAID) that reduces pain, fever, and inflammation by inhibiting the cyclooxygenase (COX) enzymes responsible for prostaglandin synthesis. It is one of the most common … Read more
