Nickel-Catalyzed Cyclization of ortho-Iodoketoximes and ortho-Iodoketimines with Alkynes: Synthesis of Highly Substituted Isoquinolines and Isoquinolinium Salts
A convenient method for the synthesis of highly substituted isoquinolines and isoquinolinium salts by the nickel‐catalyzed cyclization of ortho‐haloketoximes and ‐ketimines, respectively, with alkynes is described. The reaction of ortho‐haloketoximes and various alkynes in the presence of [Ni(PPh3)2Br2] and zinc powder in a mixture of acetonitrile and tetrahydrofuran at 80 °C for 15 hours gave 1,3
A Pd-catalyzed cascade Ullmann coupling–aldol–dehydration reaction of ortho-acylphenyl iodides affords colchino analogues with wide functional group tolerance.
Palladium-Catalyzed Enantioselective Cyclization of Silyloxy-1,6-Enynes
作者:Britton K. Corkey、F. Dean Toste
DOI:10.1021/ja068723r
日期:2007.3.1
Binaphane−Pd(II) complexes as catalysts for the formation of methylene cyclopentane adducts from 1,6-enyne precursors. The utility of this reaction is illustrated by its application to the totalsynthesis of the cytotoxic cyclolaurane-type sesquiterpene, (−)-laurebiphenyl.
A palladium‐catalyzedenantioselective intramolecular σ‐bond cross‐exchange between C−I and C−C bonds is realized, providing chiral indanones bearing an alkyl iodide group and an all‐carbon quaternarystereocenter. Pd/TADDOL‐derived phosphoramidite is found to be an efficient catalytic system for both C−C bond cleavage and alkyl iodide reductive elimination. In addition to aryl iodides, aryl bromides
Palladium-Catalyzed Sequential C–H Activation/Amination with Diaziridinone: An Approach to Indoles
作者:Jing Li、Jinhua Chen、Luying Wang、Yian Shi
DOI:10.1021/acs.orglett.1c01043
日期:2021.5.7
an important class of molecules. This paper describes an efficient palladium-catalyzed synthesis of indoles from 2-iodostyrenes and di-t-butyldiaziridinone with a simultaneous installation of two C–N bonds. The reaction process likely proceeds through the oxidative insertion of Pd to aryl iodide and subsequent vinyl C–Hactivation to from a pallada(II)cycle intermediate, which is bisaminated by di