The purpose of this video is to help second-year organic chemistry students review the concepts and questions that most frequently appear on standardized entrance exams, like the MCAT, DAT, PCAT, and GRE. In this video I\u27ll review the following reduction reactions: hydrogenations of alkenes and alkynes, reductive amination, and Clemmensen and Wolff-Kishner reductions. I\u27ll also teach you the following organometallic reactions: Grignard reactions; hydride (sodium borohydride, lithium aluminum hydride, and DIBAL hydride) reductions of carbonyl compounds; protecting carbonyls as ketals and acetals; cuprate and Suzuki coupling reactions; olefin metathesis; and the Wittig reaction. --Dr. Mike Christiansen from Utah State University