Palladium-Catalyzed Chemoselective Aminomethylative Cyclization and Aromatizing Allylic Amination: Access to Functionalized Naphthalenes
作者:Bangkui Yu、Houjian Yu、Hanmin Huang
DOI:10.1021/acs.orglett.0c03365
日期:2020.11.20
A palladium-catalyzedchemoselective aminomethylative cyclization and aromatizing allylic amination of enyne-tethered allylic alcohols with aminals is described. Under the reaction conditions, the cationic vinyl allylpalladium species undergoes selective migratory insertion of alkenes rather than reductive elimination with nucleophiles. This strategy provides an efficient and unique approach to the
Synthesis of Substituted Isoquinolines by Electrophilic Cyclization of Iminoalkynes
作者:Qinhua Huang、Jack A. Hunter、Richard C. Larock
DOI:10.1021/jo020020e
日期:2002.5.1
pyridinecarbaldehydes have been cyclized under very mild reaction conditions in the presence of I(2), ICl, PhSeCl, PhSCl, and p-O(2)NC(6)H(4)SCl to give the corresponding halogen-, selenium-, and sulfur-containing disubstituted isoquinolines and naphthyridines, respectively. This methodology accommodates a variety of iminoalkynes and affords the anticipated heterocycles in moderate to excellent yields. Monosubstituted
Design and Synthesis of Fused Pyridine Building Blocks for Automated Library Generation
作者:Helena Mora‐Radó、Werngard Czechtizky、María Méndez、Joseph P. A. Harrity
DOI:10.1002/cmdc.202000852
日期:2021.1.19
We demonstrate that a diboration‐electrocyclization sequence provides access to a range of pyridine‐fused, small‐molecule boronic ester buildingblocks, and that these are amenable to high‐throughput synthesis leading to biaryl and ether‐linked compound libraries. Moreover, the implementation of an integrated physicochemical and ADME profiling workflow allows accelerated design of novel lead compounds
Cu(<scp>i</scp>)-Catalyzed addition–cycloisomerization difunctionalization reaction of 1,3-enyne-alkylidenecyclopropanes (ACPs)
作者:Peng-Hua Li、Yin Wei、Min Shi
DOI:10.1039/d0ob01692f
日期:——
A copper(I)-catalyzed three-component addition–cycloisomerization difunctionalization reaction of 1,3-enyne-ACPs with Togni I reagent and TMSCN under mild reaction conditions has been developed, affording 3-trifluoroethylcyclopenta[b]naphthalene-4-carbonitrile derivatives. The reaction proceeded through a copper(I)-catalyzed 1,4-addition of conjugated 1,3-enynes via a radical relay process and aromatic
开发了铜(I)在温和的反应条件下,用Togni I试剂和TMSCN在1,3-烯炔-ACPs上催化铜的三组分加成-环异构化双官能化反应,得到3-三氟乙基环戊[ b ]萘-4-甲腈衍生物。通过铜进行反应(我)催化的1,4-加成共轭1,3-烯炔的通过自由基中继处理和丙二烯-ACP中间体的芳族环异构。
Synthesis of Chiral Tetrasubstituted Alkenes by an Asymmetric Cascade Reaction Catalyzed Cooperatively by Cationic Rhodium(I) and Silver(I) Complexes
作者:Daiki Hojo、Keiichi Noguchi、Ken Tanaka
DOI:10.1002/anie.200904024
日期:2009.10.12
have been prepared with high enantioselectivity by the title transformation. This reaction was successfully applied to the enantio‐ and diastereoselective synthesis of tetrasubstituted helical alkenes possessing both central and helical chirality (see scheme).