Primary Amine, Thiourea-Based Dual Catalysis Motif for Synthesis of Stereogenic, All-Carbon Quaternary Center-Containing Cycloalkanones
摘要:
The enantioselective synthesis of alpha,alpha-disubstituted cycloalkanones has been developed using a primary amine, thiourea-based dual catalysis pathway. A range of electrophiles and ring sizes are tolerated under the reaction conditions. A possible catalytic cycle is presented to explain the reactivity.
Application of “Hydrogen Bonding Interaction” in New Drug Development: Design, Synthesis, Antiviral Activity, and SARs of Thiourea Derivatives
作者:Aidang Lu、Ziwen Wang、Zhenghong Zhou、Jianxin Chen、Qingmin Wang
DOI:10.1021/jf505355r
日期:2015.2.11
A series of simple thiourea derivatives were designed based on the structure of natural product harmine and lead compound and synthesized from amines in one step. The antiviral activity of these thiourea derivatives was evaluated. Most of them exhibited significantly higher anti-TMV activity than commercial plant virucides ribavirin, harmine, and lead compound. The hydrogen bond was found to be important but not the more the better. The optimal compound (R,R)-20 showed the best anti-TMV activity in vitro and in vivo (in vitro activity, 75%/500 mu g/mL and 39%/100 mu g/mL; inactivation activity, 71%/500 mu g/mL and 35%/100 mu g/mL; curative activity, 73%/500 mu g/mL and 37%/100 mu g/mL; protection activity, 69%/500 mu g/mL and 33%/100 mu g/mL), which is significantly higher than that of Ningnanmycin. The systematic study provides strong evidence that these simple thiourea derivatives could become potential TMV inhibitors.
Discovery of Chiral Diamine Derivatives Containing 1,2-Diphenylethylenediamine as Novel Antiviral and Fungicidal Agents
作者:Shan Yang、Tienan Wang、Aidang Lu、Qingmin Wang
DOI:10.1021/acs.jafc.3c01247
日期:2023.7.26
and the lack of effective suppressive drugs makes plant disease control a huge challenge. Natural product-based structural simplification is an important strategy for finding novel pesticide candidates. According to our previous research on the antiviral activities of harmine and tetrahydroharmine derivatives, a series of chiral diamine compounds were designed and synthesized by means of structural