Recent Advances in Chemistry of γ-Lactams: Part II. Functionalization by C-C or CHeteroatom Bond FormationEnantioselectivityfunctionalizationlactam stereoselectivitysynthetic methodOwing to the interest that -lactams (pyrrolidin-2-ones) deserve for medicinal and natural products chemistry, the development of...
Transition metal catalyzed bond formation is a fundamental process in catalysis and is of general interest throughout chemistry. To date, however, the knowledge of association reactions is rather limited, relative to what is known about dissociative processes. For example, surprisingly little is known...
Primary bond formation takes place by various interactions between electrons in the outermost shell of two atoms resulting in the production of a more stable state. The three main basic types of primary bond are ionic, covalent, and coordinate. ...
Rhodium(III)-catalyzed direct functionalization of C-H bonds under oxidative conditions leading to C-C, C-N, and C-O bond formation is reviewed. Various arene substrates bearing nitrogen and oxygen directing groups are covered in their coupling with unsaturated partners such as alkenes and alkynes...
We have previously reported an efficient synthesis of a chiral nonracemic andC2-symmetric 2,2′-bipyridyl ligand1(Fig. 1).1,2In addition, we have demo... MPA Lyle - 《Organic & Biomolecular Chemistry》 被引量: 0发表: 2003年 Mechanistic studies of the transfer dehydrogenation of cyclooctane...
When nitrogen and oxygen (sulphur) atoms in the heterocyclic ring change hydrogen atoms, tautomers are produced. The proton transfer and hydrogen bonding of the hydrogen atom are significant properties in chemistry. As a result, equilibrium between (enolimines/thiol and ketoenamines/thione forms) ...
Ch 12.NYSTCE Chemistry: Chemical Bonds Chemical Bond | Definition, Types & Formation5:08 4:19 Next Lesson Octet Rule & Lewis Structure | Definition & the Periodic Table Ions | Formation, Types & Charge4:45 Lewis Dot Structure | Definition, Diagrams & Examples6:52 ...
This chapter reviews QM/MM methods, and in particular their application to studies of enzyme mechanisms. ... A. Mulholland - 《Theoretical & Computational Chemistry》 被引量: 24发表: 2001年 加载更多来源期刊 Journal of the American Chemical Society 研究点推荐 enzymatic C-F bond formation QM/...
Here, we demonstrate Si–Si bond formation in on-surface chemistry. Polymerization upon multiple Si–H bond dissociation and subsequent Si–Si bond formation was achieved on Au(111) and Cu(111) surfaces by using two different monomers, each containing two silicon functional groups (CH3SiH2 or ...
One of the most important reactions in organic chemistry—amide bond formation—is often overlooked as a contemporary challenge because of the widespread occurrence of amides in modern pharmaceuticals and biologically active compounds. But existing methods are reaching their inherent limits, and concerns ...