A highly site-selective acyloxylation of stable enamines with PhI(OAc)2 under metal-free conditions to afford (E)-vinyl acetate derivatives in good to excellent yields is described. Depending on the judicious choice of the solvent system, either the α- or β-site-selective product could be obtained with high selectivity. For the α-site-selective product, the rearranged amide compound is obtained as
Microscale Parallel Synthesis of Acylated Aminotriazoles Enabling the Development of Factor XIIa and Thrombin Inhibitors
作者:Simon Platte、Marvin Korff、Lukas Imberg、Ilker Balicioglu、Catharina Erbacher、Jonas M. Will、Constantin G. Daniliuc、Uwe Karst、Dmitrii V. Kalinin
DOI:10.1002/cmdc.202100431
日期:2021.12.14
approach toward N-acylated aminotriazoles is reported, enabling the compounds’ screening against FXIIa and thrombin. This approach afforded low-nanomolar FXIIa and thrombininhibitors with no off-targeting of the other tested serine proteases. Selected compounds were shown to be covalent inhibitors of FXIIa and demonstrated anticoagulant properties in vitro, influencing the intrinsic blood coagulation
KIO<sub>3</sub>-Catalyzed Aerobic Cross-Coupling Reactions of Enaminones and Thiophenols: Synthesis of Polyfunctionalized Alkenes by Metal-Free C–H Sulfenylation
The synthesis of polyfunctionalized aminothioalkenes has been realized via the direct C–H sulfenylation of enaminones and analogous enamines. These cross-coupling reactions have been achieved by simple KIO3 catalysis under aerobic conditions without employing any transition metal catalyst or additional oxidant. The employment of bio-basedgreensolventethyllactate as the reaction medium constitutes
Synthesis of symmetrical 2,8-dioxabicyclo[3.3.1]nonanes (4) is accomplished by the reaction of β-enamino ketones (1) and 1,3-cyclohexanediones (2) in AcOH. However, the presence of TFA in toluene gave xanthenes (5).
gem-difluorinated 2H-furans from reactions of BrCF2CO2Et with enaminones has been described. The reactions tolerate a wide variety of functional groups under metal-free conditions. An active aminocyclopropane is proposed to be a key intermediate through the cyclopropanation of difluorocarbene with enaminones, which further triggers a regioselective C–C bond cleavage in situ to afford the corresponding gem-difluorinated
已经描述了由 BrCF 2 CO 2 Et 与烯胺酮反应合成偕二氟化 2 H-呋喃的级联策略。该反应在无金属条件下耐受多种官能团。通过二氟卡宾与烯胺酮的环丙烷化反应,活性氨基环丙烷被认为是关键中间体,这进一步引发了区域选择性 C-C 键原位断裂,得到相应的偕二氟化2 H-呋喃。