This application discloses novel cyanoguanidines of the formula (I) wherein A is selected from -C(=O)-, -S(=O)2-, -C(=S)-, and -P(=O)(R5)-, wherein R5 is selected from C1-6-alkyl, C1-6-alkoxy, and hydroxy; B is selected from a single bond, -O-, -NR6- and -C(=O)-NR6-, wherein R6 is selected from hydrogen, optionally substituted C1-12-alkyl, optionally substituted C1-12-alkenyl, optionally substituted aryl, optionally substituted heterocyclyl, and optionally substituted heteroaryl; and m is an integer of 0-12 and n is an integer of 0-12, wherein the sum m+n is 1-20; and R1 is selected from optionally substituted heteroaryl; and pharmaceutically acceptable salts thereof, and prodrugs thereof. The compounds are usefuld for use as a medicament for the treatment of a disease or a condition caused by an elevated level of nicotinamide phosphoribosyltransferase (NAMPRT).
A straightforward strategy for direct benzylic C–H bond amination via an electrochemical Ritter-type reaction is developed. The reaction demonstrates simpler and milder reaction conditions over the existing methods without extra mediator. Moderate to excellent yields up to 94% of the desired amide products were obtained with a broad substrate scope. The removal of the Ac group by a simple step can
Polyoxometalate–Ionic Liquid-Catalyzed Ritter Reaction for Efficient Synthesis of Amides
作者:Lan-Cui Zhang、Shuang Gao、Lei Zhang、Bo Chen、Peipei He、Guosong Li
DOI:10.1055/a-1854-9958
日期:2022.9
acidity and miscibility, have been developed to promote the Ritterreaction. Among them, [BSmim]CuPW12O40 [BSmim = 1-methyl-3-(4-sulfobutyl)-1H-imidazol-3-ium] displayed the highest activity for the amidation of a variety of alcohols with nitriles, delivering the corresponding amide products in good to excellent yields. Furthermore, the reaction can be easily scaled up to a gram scale without losing efficiency
已经开发了一系列多金属氧酸盐-离子液体催化剂,结合了多金属氧酸盐和离子液体的特性,并引入了酸性和混溶性,以促进 Ritter 反应。其中,[BSmim]CuPW 12 O 40 [BSmim = 1-methyl-3-(4-sulfobutyl)-1 H -imidazol -3-ium]对多种醇与腈的酰胺化活性最高,相应的酰胺产品的收率很好。此外,反应可以很容易地放大到克级,而不会损失效率。因此,该方法提供了一种使用多金属氧酸盐-离子液体基催化剂通过 Ritter 反应制备酰胺的有吸引力的方法。