Metal-Free Oxidative Spirocyclization of Hydroxymethylacrylamide with 1,3-Dicarbonyl Compounds: A New Route to Spirooxindoles
摘要:
A metal-free oxidative spirocyclization of hydroxymethylacrylamide with 1,3-dicarbonyl compounds is described. The reaction proceeds through tandem dual C-H functionalization and intramolecular dehydration, in which two new C-C bonds and one C-O bond were formed. This method affords a novel and straightforward access to various spirooxindoles under mild conditions.
Different Behaviors of a Cu Catalyst in Amine Solvents: Controlling N and O Reactivities of Amide
作者:Yu Yamane、Koichiro Miyazaki、Takashi Nishikata
DOI:10.1021/acscatal.6b02309
日期:2016.11.4
Controlling the reactivity of the nitrogen or oxygen nucleophile of an amide group to form C–N or C–O bonds by tuning reaction conditions is one of the most challenging issues in the use of amides in organic synthesis. Both nucleophiles in the amide group can individually participate in reactions, and most reactions employ a substrate-controlled methodology to achieve selectivity. However, in the reaction
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
AgSCF3 Radical Addition Based on an Oxidant-Free α,β-Amide (Trifluoromethyl)sulfanylation Reaction
作者:Yang Li、Zhi-Bo Li、Jin Zhang、Yi-Ran Shi、Hong Li、Min-Ge Yang、Wen-Qing Zhu、Qiang-Wei Fan
DOI:10.1055/s-0043-1763759
日期:2024.12
(Trifluoromethyl)sulfanylamides are an important class of organic compounds that are common among natural products and drug molecules. Here, we report a (trifluoromethyl)sulfanylation reaction using silver(I) (trifluoromethyl)sulfide as a free-radical (trifluoromethyl)sulfanylation reagent for β-amide compounds. This reaction does not require stoichiometric oxidants or additional transition-metal catalysts