Iridium-Triggered Allylcarbamate Uncaging in Living Cells
作者:Neelu Singh、Ajay Gupta、Puja Prasad、Pritam Mahawar、Shalini Gupta、Pijus K. Sasmal
DOI:10.1021/acs.inorgchem.1c01790
日期:2021.9.6
solubility, stability, toxicity, cell uptake, and reactivity within complex biological milieu for bioorthogonal controlled transformation reactions is a highly formidable challenge. Herein, we report an organoiridium complex that is nontoxic and capable of the uncaging of allyloxycarbonyl-protected amines under biologically relevant conditions and within livingcells. The potential applications of this
设计一种金属催化剂来解决复杂生物环境中的溶解性、稳定性、毒性、细胞吸收和反应性等主要问题,用于生物正交控制的转化反应是一项非常艰巨的挑战。在此,我们报告了一种有机铱络合物,该络合物无毒且能够在生物相关条件下和活细胞内解开烯丙氧羰基保护的胺。通过在 HeLa 细胞内以受控方式激活原荧光团和前药后产生诊断和治疗剂,已经证明了这种解笼锁化学的潜在应用,为许多潜在的生物学和治疗应用提供了宝贵的工具。
Iron-Catalyzed Cross-Coupling of Alkenyl Acetates
作者:Dominik Gärtner、André Luiz Stein、Sabine Grupe、Johannes Arp、Axel Jacobi von Wangelin
DOI:10.1002/anie.201504524
日期:2015.9.1
unreactive in cross‐coupling reactions which mostly employ more electrophilic halides or activated esters (triflates, tosylates). Acetates are cheap and easily accessible electrophiles but have not been used in cross‐couplings because the strong CO bond and high propensity to engage in unwanted acetylation and deprotonation. Reported herein is a selective iron‐catalyzedcross‐coupling of diverse alkenyl
An Efficient Synthesis of Dibenzocycloocta-4a,6a,-diene-5,11-diyne
and its Precursors
作者:Fred Wudl、Sterling Chaffins、Michael Brettreich
DOI:10.1055/s-2002-32542
日期:——
efficient syntheses of dibenzocyclooctadienediyne 1 were developed employing known reactions, which utilize commercially available reagents. Both methods are an improvement on known syntheses resulting in 41% and 43% overall yields. The latter method also offers an efficient synthesis of dibenzocyclooctateraene 9, which is one of the key reagents nowcommercially unavailable.
Planarchiral 5,11‐disubstiuted dibenzo[a,e]cyclo‐octatetraenes (dbCOTs) have been developed as the first useful chiral homologs to dbCOT‐ligands for asymmetric applications. Methods enabling the preparation of such compounds on a gram‐scale in enantiomerically pure form are described. Evaluated as ligands in rhodium(I)‐catalyzed 1,4‐ and 1,2‐arylation reactions, tertiary and quarternary stereogenic