Palladium-Catalyzed Regioselective <i>Syn</i>-Chloropalladation–Olefin Insertion–Oxidative Chlorination Cascade: Synthesis of Dichlorinated Tetrahydroquinolines
作者:Perumal Vinoth、Muthu Karuppasamy、B. S. Vachan、Isravel Muthukrishnan、C. Uma Maheswari、Subbiah Nagarajan、Vittorio Pace、Alexander Roller、Nattamai Bhuvanesh、Vellaisamy Sridharan
DOI:10.1021/acs.orglett.9b01295
日期:2019.5.3
involving syn-chloropalladation, intramolecular olefin insertion, and oxidative C–Cl bond formation reactions was demonstrated for the synthesis of dichlorinated tetrahydroquinolines in high yields (up to 93%). The N-propargyl arylamines having a tethered α,β-unsaturated carbonyl moiety underwent a regioselective syn-chloropalladation followed by a Heck-typereaction to deliver the tetrahydroquinoline
涉及钯催化级联过程顺-chloropalladation,分子内的烯烃插入,和氧化C-Cl键形成反应证实为二氯化四氢喹啉的以高收率合成(高达93%)。具有拴系的α,β-不饱和羰基部分的N-炔丙基芳基胺经历区域选择性的顺-氯钯化,然后进行Heck型反应以递送四氢喹啉骨架。第二个氯原子的稀有插入被合理化,包括Pd II / IV催化循环和C-Pd II键的氧化裂解。
Ruthenium-catalyzed oxidative decyanative cross-coupling of acetonitriles with amines in air: a general access to primary to tertiary amides under mild conditions
Catalyzed by Ru and in the presence of air and nucleophiles such as amines or ammonia, activation of the C–CN bond could be easily achieved under mild conditions to produce primary to tertiary amides in good to excellent yields. The use of accessible and functional-group-tolerant starting materials, a cheap, low-loading and recyclable catalyst, ligand-free conditions and excellent product yields are
Relative Rate Profiles of Functionalized Iodoarene Catalysts for Iodine(III) Oxidations
作者:Timothy R. Lex、Maria I. Swasy、Daniel C. Whitehead
DOI:10.1021/acs.joc.5b02129
日期:2015.12.18
A series of rate studies were conducted to evaluate the steric and electronic properties that govern the reactivity of iodoarene amide catalysts in the α-oxytosylation of propiophenone. A meta-substituted benzamide catalyst emerged as the most reactive. This catalyst was employed in the α-oxytosylation of a series of substituted propiophenones, returning the α-tosyloxy ketone products in excellent