Catalytic Staudinger Reduction at Room Temperature
作者:Danny C. Lenstra、Joris J. Wolf、Jasmin Mecinović
DOI:10.1021/acs.joc.9b00831
日期:2019.5.17
catalytic Staudingerreduction at room temperature that enables the preparation of a structurally diverse set of amines from azides in excellent yields. The reaction is based on the use of catalytic amounts of triphenylphosphine as a phosphine source and diphenyldisiloxane as a reducing agent. Our catalytic Staudingerreduction exhibits a high chemoselectivity, as exemplified by reduction of azides
reduction of primary amides into the corresponding amines using a polymethylhydrosiloxane (PMHS)–Ti(OiPr)4 reducing system is described. Aromatic as well as aliphatic primary amides are reduced in high selectivity and excellent yields. The reduction could proceed via dehydration of the primary amide group into the corresponding nitrile which is then reduced into the corresponding primary amine.
描述了一种使用聚甲基氢硅氧烷(PMHS)–Ti(O i Pr)4还原体系将伯酰胺还原为相应胺的简单而有用的方法。芳族伯酰胺和脂族伯酰胺的高选择性和优异的收率得到降低。还原可通过将伯酰胺基脱水成相应的腈而进行,然后将其还原成相应的伯胺。
A Proton-Switchable Bifunctional Ruthenium Complex That Catalyzes Nitrile Hydroboration
作者:Jacob B. Geri、Nathaniel K. Szymczak
DOI:10.1021/jacs.5b08406
日期:2015.10.14
framework bearing pendent proton-responsive hydroxyl groups was prepared and metalated with Ru(II) and subsequently isolated in four discrete protonation states. Stoichiometric reactions with H2 and HBPin showed facile E-H (E = H or BPin) activation across a Ru(II)-O bond, providing access to unusual Ru-H species with strong interactions with neighboring proton and boron atoms. These complexes were found