Synthesis, antiproliferative activity evaluation and structure–activity relationships of novel aromatic urea and amide analogues of N-phenyl-N′-(2-chloroethyl)ureas
Seven subsets of aromatic urea and amide analogues of N-phenyl-N′-(2-chloroethyl)ureas (CEU) have been synthesized by nucleophilic addition of 3-chloropropylisocyanate, 2-chloroacetylisocyanate, ethylisocyanate, 2-chloroacetyl chloride, 3-chloropropanoyl chloride, 4-chlorobutanoyl chloride, and acryloyl chloride, respectively, to selected anilines or benzylamines to afford 3-chloropropylureas (1, CPU)
通过亲核加成3-氯丙基异氰酸酯,2-氯乙酰基异氰酸酯,乙基异氰酸酯,2-氯乙酰氯,3-氯丙酰基,已经合成了N-苯基-N' -(2-氯乙基)脲(CEU)的七个芳香族脲和酰胺类似物。氯化物,4-氯丁酰氯和丙烯酰氯分别转化为选定的苯胺或苄胺,得到3-氯丙基脲(1,CPU),2-氯乙酰脲(2,CAU),乙基脲(3,EU),2-氯乙酰胺(4,CA),3-氯丙酰胺(5,CPA),4-氯丁酰胺(6,CBA)和丙烯酰胺(7,Acr)。这些化合物的分子结构已通过IR,1 H和13 C NMR确认,MS光谱及其纯度也已通过HPLC确认。评估了CEU类似物对三种人肿瘤细胞系,即人结肠癌HT-29,人皮肤黑素瘤M21和人乳腺癌MCF-7的抗增殖活性。CAU(2c至2g),CA(4a至4d,4f和4g),CPA(5a)和Acr(7a和7b)的IC 50范围为1.4至25μM。CAU,CA,CPA和Acr通过作用机制
Synthesis of α-Aryl Secondary Amides via Nickel-Catalyzed Reductive Coupling of Redox-Active Esters
作者:Alexis L. Gabbey、Nicholas W. M. Michel、Jonathan M. E. Hughes、Louis-Charles Campeau、Sophie A. L. Rousseaux
DOI:10.1021/acs.orglett.2c00918
日期:2022.5.6
The transition-metal-catalyzed α-arylation of secondary amides remains a synthetic challenge due to the presence of a free N–H bond. We report a strategy to synthesize secondary α-aryl amides via a Ni-catalyzed reductive arylation of redox-active N-hydroxyphthalimide (NHP) esters of malonic acid half amides. This transformation proceeds under mild conditions and displays excellent chemoselectivity