Palladium-Catalyzed Oxidative <i>N</i>-Dealkylation/Carbonylation of Tertiary Amines with Alkynes to α,β-Alkynylamides
作者:Rajendra S. Mane、Bhalchandra M. Bhanage
DOI:10.1021/acs.joc.6b00386
日期:2016.6.17
The first highly effective Pd/C-catalyzed oxidative N-dealkylation/carbonylation of various aliphatic as well as cyclic tertiaryamines with alkynes has been described. The selective sp3 C–N bond activation of tertiaryamines at the less steric side using O2 as a sole oxidant and a plausible reaction pathway for the reaction are discussed. The general and operationally simple methodology provides an
Synthesis, photophysical properties of triazolyl-donor/acceptor chromophores decorated unnatural amino acids: Incorporation of a pair into Leu-enkephalin peptide and application of triazolylperylene amino acid in sensing BSA
The research in the field of design and synthesis of unnatural amino acids is growing at a fast space for the increasing demand of proteins of potential therapeutics and many other diversified novel functional applications. Thus, we report herein the design and synthesis of microenvironment sensitive fluorescent triazolyl unnatural amino acids (UNAA) decorated with donor and/or acceptor aromatic chromophores
A large number of trifluoromethylthiolation methods have been developed, but a trifluoromethylthiolation reagent usually has to be used in these methods. Herein we describe a difluorocarbene-based trifluoromethylthiolation of terminal alkynes to construct a Csp-SCF3 bond catalysed by a copper complex. Ph3P+CF2CO2-/S8/F- was used as a reagent system to form the CF3S- anion, and the sequential formation
已经开发了大量的三氟甲基硫醇化方法,但是在这些方法中通常必须使用三氟甲基硫醇化试剂。在本文中,我们描述了末端炔烃的基于二氟卡宾的三氟甲基硫醇化,以构建由铜配合物催化的Csp-SCF 3键。用Ph 3 P + CF 2 CO 2- / S 8 / F-作为试剂体系形成CF 3 S-阴离子,依次形成CF 2 = S,F-CF 2 S和C-SCF 3一步一步就可以实现纽带。
Accessing alternative reaction pathways of the intermolecular condensation between homo-propargyl alcohols and terminal alkynes through divergent gold catalysis
作者:Courtney A. Smith、Stephen E. Motika、Lukasz Wojtas、Xiaodong Shi
DOI:10.1039/c6cc09794d
日期:——
An intermolecular condensation of alkynols and terminal alkynes is reported. Using IPrAuNTf2, an efficient Au-catalyzed cyclization-alkynylation strategy furnishes (2-arylalkynyl) cyclic ethers in moderate to excellent yields (up to 94%). This...
据报道,炔醇和末端炔烃发生分子间缩合。使用 IPrAuNTf2,一种有效的 Au 催化环化-炔基化策略可以以中等至优异的产率(高达 94%)提供(2-芳基炔基)环醚。这...