A series of N-alkyl substituted urea derivatives were synthesized and evaluated for their in vitro antibacterial and antifungal activities. The N-alkyl substituted urea derivatives bearing morpholine moiety (3a–3k) showed better activities than those bearing diethylamine moiety (2a–2f). Compounds having fluoro substituent at ortho (3c) and para (3b) positions of the phenyl ring exhibited potent antimicrobial
A direct transformation of N-aryl formamides to the corresponding phenylurea derivatives via the formation of isocyanate intermediates is achieved in good yields using hypervalent iodine reagents as external oxidants.
The invention relates to novel Δ
1
-pyrrolines of the formula (I)
in which R
1
, R
2
, R
3
, A, R
4
and m have the meanings given in the disclosure, to a number of processes for preparing these substances, and to their use for controlling pests. The invention further relates to novel intermediates and their preparation.
本发明涉及新型 Δ
1
-式(I)的新型吡咯啉类化合物
其中 R
1
, R
2
, R
3
A, R
4
和 m 的含义,以及制备这些物质的若干工艺和它们在控制害虫方面的用途。本发明还涉及新型中间体及其制备方法。
A novel photocatalytic urea synthesis strategy is proposed for the preparation of ureas from amines and carbon disulfide (CS), with Rhodamine B utilized as the photocatalyst. Conducted under mild reaction conditions, this method does not require the use of extra oxidants and efficiently yields a series of (un)symmetrical ureas and benzimidazolones under blue light irradiation. Furthermore, control
提出了一种新的光催化尿素合成策略,以罗丹明 B 作为光催化剂,由胺和二硫化碳 (CS) 制备尿素。该方法在温和的反应条件下进行,不需要使用额外的氧化剂,并且在蓝光照射下有效地产生一系列(不)对称的脲和苯并咪唑酮。此外,还进行了氧18标记对照实验,结果表明尿素产品中的羰基氧主要来自空气中的氧,通过氧化脱硫过程获得。