聚多巴胺氨基磺酸官能化的磁性Fe 3 O 4纳米颗粒(Fe 3 O 4 @ PDA-SO 3 H)作为非均相和可回收的纳米催化剂,用于无溶剂条件下醇和胺的甲酰化
摘要:
本文中,结构上不同的胺类和醇类与甲酸乙酯的甲酰化反应是在催化比例的磺酸负载在聚多巴胺(PDA)包裹的Fe 3 O 4纳米颗粒上作为多相,可回收且高效的催化剂进行的。该方法在无溶剂条件下以良好或优异的收率提供了相应的N-甲酰基化合物。通过使用外部磁体设备绕开了费时的过滤操作,回收了磁催化系统。该程序还提高了产品的纯度,并有望带来经济和生态优势。此外,证实了催化剂的回收和再利用五次,没有发现活性损失。
Organocatalytic Decarboxylation of Amino Acids as a Route to Bio‐based Amines and Amides
作者:Laurens Claes、Michiel Janssen、Dirk E. De Vos
DOI:10.1002/cctc.201900800
日期:2019.9.5
Amino acids obtained by fermentation or recovered from protein waste hydrolysates represent an excellent renewable resource for the production of bio‐based chemicals. In an attempt to recycle both carbon and nitrogen, we report here on a chemocatalytic, metal‐free approach for decarboxylation of amino acids, thereby providing a direct access to primary amines. In the presence of a carbonyl compound
4-Thio Derivatives of Dibenzosuberone: Potential Antidepressant Compounds
作者:Paulo R.C. Martins、Gilberto A. Romeiro、Carlos M.R. Ribeiro
DOI:10.2174/157017810791514634
日期:2010.7.1
This work describes the synthesis of a series of nine 4-thio dibenzosuberone derivatives (10,11-dihydro-5Hdibenzo[ a,d]cycloheptane-5-one derivatives). Ullmanns reaction was used to synthesize six 4-thio dibenzosuberone derivatives 10-15 from 4-iodo dibenzosuberone 9. Compound 9 was synthesized from dibenzosuberone 7 through the use of TTFA [thallium (III) trifluoroacetate] and KI. Hydrolysis of 10 yielded derivative 14. Compound 17, which was prepared through the chlorination of 14, was aminated to furnish 4-thio derivative 18.
Catalytic Performance of Immobilized Sulfuric Acid on Silica Gel for N-Formylation of Amines with Triethyl Orthoformate
作者:Sodeeq Aderotimi Salami、Xavier Siwe-Noundou、Rui W. M. Krause
DOI:10.3390/molecules27134213
日期:——
In the search for convenient, green, and practical catalytic methods for the current interest in organic synthesis, a simple, green, and highly efficient protocol for N-formylation of various amines was carried out in the presence of immobilized sulfuric acid on silica gel (H2SO4–SiO2). All reactions were performed in refluxing triethyl orthoformate (65 °C). The product formamides were obtained with