A Simple Protocol for Efficient N-Chlorination of Amides and Carbamates
作者:Giampaolo Giacomelli、Lidia De Luca、Giammario Nieddu
DOI:10.1055/s-2004-836061
日期:——
N-Chlorination of various amides, lactams, and carbamates with very cheap trichloroisocyanuric acid proceeds efficiently under very mild conditions. Excellent results were also observed for the N-chlorination of carbamates of free amino acids.
This application describes compounds useful as anti-microbial agents, including as antibacterial, disinfectant, antifungal, germicidal or antiviral agents.
New Protocol for Efficient<i>N</i>-Chlorinations of Amides and Carbamates
作者:Armin de Meijere、Oleg V. Larionov、Sergei I. Kozhushkov
DOI:10.1055/s-2003-41037
日期:——
N-Chlorination of various amides, carbamates and lactams with inexpensive and stable calcium hypochlorite on moist alumina proceeds smoothly and efficiently, e.g. the technically important 1-chlorohexahydroazepin-2-one (3-Cl) and 1-chloropyrrolidin-2-one (7-Cl) were obtained in 95% and 98% yield, respectively. Excellent results were also observed for the N-chlorination of protected amino acid esters with a cyclopropane moiety to give derivatives such as methyl (tert-butoxycarbonylchloroamino)cyclopropylacetate (1-Cl), methyl (benzyloxycarbonylchloroamino)cyclopropylacetate (2-Cl), methyl 1-(tert-butoxycarbonylchloroamino)cyclopropanecarboxylate (5-Cl) and methyl trans-2-(tert-butoxycarbonylchloroamino)cyclopropanecarboxylate (6-Cl) in 99%, 96%, 90% and 97% yield, respectively.
<i>N</i>-Chlorination rate of five-membered heterocyclic nitrogen compounds
作者:Cristina Pastoriza、Juan Manuel Antelo、Francisco Andrés Amoedo、Mercedes Parajó
DOI:10.1002/poc.3545
日期:2016.8
The kinetics of N‐chlorination reaction of pyrrolidine, pyrrolidone, succinimide, 5,5,‐dimethyloxazolidine‐2,4‐dione, 5,5‐dimethylhydantoin and 1‐hydroximethyl‐5,5‐dimethylhydantoin with HOCl in aqueous solution were studied at 25 °C, constant ionic strength and under isolation conditions in a wide pH range. The set of compounds studied in this paper is characterized by having different functional
研究了吡咯烷,吡咯烷酮,琥珀酰亚胺,5,5,5-二甲基恶唑烷-2,4-二酮,5,5-二甲基乙内酰脲和1-羟肟基-5,5-二甲基乙内酰脲与HOCl在水溶液中的N氯化反应动力学。25°C,恒定的离子强度,在宽pH范围内的隔离条件下。本文研究的一组化合物的特征是具有不同的官能团和相同的环状结构,该结构由五元环组成,环中带有氮原子,易被氯化。该系列化合物涵盖九个p K a单元,动力学研究使我们知道,氨基,酰胺或酰亚胺基团的存在会改变含氮化合物的反应性。