2-Arylallyl as a new protecting group for amines, amides and alcohols
作者:José Barluenga、Francisco J. Fañanás、Roberto Sanz、César Marcos、José M. Ignacio
DOI:10.1039/b414966a
日期:——
Amines, amides and ethers containing 2-arylallyl groups are selectively and easily deprotected with tert-butyllithium. This transformation probably involves a carbolithiation reaction of the styrenyl moiety followed by a β-elimination process.
Functionalized Phenanthridine and Dibenzopyranone Derivatives through Benzyne Cyclization – Application to the Total Syntheses of Trisphaeridine andN-Methylcrinasiadine
作者:Roberto Sanz、Yolanda Fernández、M. Pilar Castroviejo、Antonio Pérez、Francisco J. Fañanás
DOI:10.1002/ejoc.200600621
日期:2007.1
series of regioselectively functionalized benzo[c]chromen-6-ones, phenanthridinones, and phenanthridinederivatives have been prepared by an anionic cyclization and in situ oxidation sequence starting from 2-bromobenzyl-2-fluorophenyl ethers and amines. These processes involve the generation of a benzyne-tethered aryllithium intermediate and subsequent 6-exo-dig cyclization. By applying this methodology
Facet-Dependent Catalytic Activity of Palladium Nanocrystals in Tsuji-Trost Allylic Amination Reactions with Product Selectivity
作者:Kaushik Chanda、Sourav Rej、Shu-Ya Liu、Michael H. Huang
DOI:10.1002/cctc.201500300
日期:2015.6.15
demonstrated to catalyze the amination reaction by using a wide variety of substituted anilines, but the cubes were the best catalyst with consistently the highest efficiency, product yield, and product selectivity. This work demonstrates that the use of metal nanocrystals with proper facet control is important for catalyzing coupling reactions with product selectivity.
Palladium-catalyzed selective aminoamidation and aminocyanation of alkenes using isonitrile as amide and cyanide sources
作者:Huanfeng Jiang、Hanling Gao、Bifu Liu、Wanqing Wu
DOI:10.1039/c4cc07743a
日期:——
An efficient aminoamidation and aminocyanation reaction of alkenes has been developed for the synthesis of substituted indolines, tetrahydroisoquinolines and pyrrolidines.
A cyanoborohydride‐promoted radicalcyclization methodology has been developed to access α‐chlorolactams in a simple and efficient way using NaBH3CN and trichloroacetamides easily available from allylic and homoallylic secondary amines. This methodology allowed the synthesis of a library of α‐chlorolactams (mono‐ and bicyclic), which were tested for herbicidal activity, trans‐3‐chloro‐4‐methyl‐1‐(