Various aromatic and heterocyclic oxazolines were directly converted to respective cyanomethyl esters with pyridinium hydrobromide perbromide in water at room temperature.
The first oxidativecoupling of alkylnitriles with aromatic carboxylicacids using di-tert-butyl peroxide (DTBP) as oxidant was achieved under the catalysis of ionic Fe(III) complexes bearing an imidazolinium cation. This protocol features nontoxic iron catalysis, direct α-C(sp3)–H bond oxidative esterification of alkylnitriles, non-prefunctionalized starting materials, and a broad substrate scope
Cyanoacetic Acid as a Masked Electrophile: Transition-Metal-Free Cyanomethylation of Amines and Carboxylic Acids
作者:Hongxiang Wang、Ying Shao、Hao Zheng、Hanghang Wang、Jiang Cheng、Xiaobing Wan
DOI:10.1002/chem.201502733
日期:2015.12.7
Using cyanoaceticacid as a maskedelectrophile, a new cyanomethylation reaction of amines and carboxylicacids was developed, producing a variety of α‐aminonitriles and cyanomethyl esters with good yields and excellent functionality tolerance. This protocol features simple manipulation, inexpensive reagents, and a wide substrate scope. Iodoacetonitrile was generated in situ from the iodination–decarboxylation
[EN] COMPOSITIONS AND METHODS FOR MAKING HYBRID POLYPEPTIDES<br/>[FR] COMPOSITIONS ET PROCÉDÉS DE PRÉPARATION DE POLYPEPTIDES HYBRIDES
申请人:UNIV YALE
公开号:WO2020247605A1
公开(公告)日:2020-12-10
Compositions and methods of making hybrid polypeptides and other polymers are disclosed. For example, functionalized tRNA having a functional molecule including a benzoic acid or benzoic acid derivative acylated to the 3' nucleotide of a tRNA are provided. Functionalized tRNA having a functional molecule including a malonic acid or malonic acid derivative acylated to the 3' nucleotide of a tRNA are also provided. Methods of using the functionalized tRNA for making compounds including the functional molecule are also provided. The methods typically include providing or expressing a messenger RNA (mRNA) encoding the target polypeptide in a translation system including one or more functionalized tRNA wherein each functionalized tRNA recognizes at least one codon such that its functional molecule is incorporated into the polypeptide or other polymer during translation. The incorporation of the functional molecule can occur in vitro in a cell-free translation system, or in vivo in a host cell.
A palladium‐catalyzed tandem reaction of cyanomethyl benzoates with arylboronic acids has been achieved. Substitution at the 2‐position of cyanomethyl benzoates was found to be crucial for the selective synthesis of oxazoles and isocoumarins. Cyanomethyl benzoates afforded 2,4‐diaryloxazoles as products, while 2‐benzoyl‐substituted cyanomethyl benzoates delivered 3‐benzoyl‐4‐aryl‐isocoumarins selectively