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。
Copper-Catalyzed Coupling of Arylboronic Acids with Potassium Cyanate: A New Approach to the Synthesis of Aryl Carbamates
作者:Ebrahim Kianmehr、Mohammad Hadi Baghersad
DOI:10.1002/adsc.201100153
日期:2011.10
The copper-catalyzedcoupling of aromaticboronicacids with potassium cyanate in the presence of an alcohol has been employed for the synthesis of arylcarbamates. This simple and highly efficient approach can be carried out in air at roomtemperature and, importantly, no base, ligand, or additive is required.
important amidyl radicals from N−H amides is an appealing and yet challenging task. Previous methods require a stoichiometric amount of a strong oxidant and/or a costly noble‐metal catalyst. We report herein the first electrocatalytic method that employs ferrocene (Fc), a cheap organometallic reagent, as the redox catalyst to produce amidyl radicals from N‐aryl amides. Based on this radical‐generating
Synthesis of Aryl Carbamates
<i>via</i>
Copper‐Catalyzed Coupling of Aryl Halides with Potassium Cyanate
作者:Xinye Yang、Yihua Zhang、Dawei Ma
DOI:10.1002/adsc.201200296
日期:2012.9.17
Coupling of aryl halides with potassiumcyanate takes place at 100–110 °C in alcohols under the catalysis of CuI (cuprous iodide) and 2‐(2,6‐dimethylphenylamino)‐2‐oxoacetic acid, affording the corresponding aryl carbamates with great diversity.
CaI<sub>2</sub>-Catalyzed direct transformation of <i>N</i>-Alloc-, <i>N</i>-Troc-, and <i>N</i>-Cbz-protected amines to asymmetrical ureas
作者:Van Hieu Tran、Hee-Kwon Kim
DOI:10.1039/c9nj03111a
日期:——
CaI2-catalyzed direct synthesis of asymmetrical ureas from N-Alloc-, N-Troc-, and N-Cbz-protected amines is developed. In this study, the efficient reaction of Alloc-, Troc-, and Cbz-carbamates with amines in the presence of catalytic CaI2 successfully generated various asymmetrical ureas. This catalytic synthetic procedure provided the desired ureas via reactions of these protected aromatic and aliphatic
Practical one-pot amidation of <i>N</i>-Alloc-, <i>N</i>-Boc-, and <i>N</i>-Cbz protected amines under mild conditions
作者:Wan Pyo Hong、Van Hieu Tran、Hee-Kwon Kim
DOI:10.1039/d1ra02242c
日期:——
A facile one-potsynthesis of amides from N-Alloc-, N-Boc-, and N-Cbz-protected amines has been described. The reactions involve the use of isocyanate intermediates, which are generated in situ in the presence of 2-chloropyridine and trifluoromethanesulfonyl anhydride, to react with Grignard reagents to produce the corresponding amides. Using this reaction protocol, a variety of N-Alloc-, N-Boc-, and