In vitro–in vivo antifungal evaluation and structure–activity relationships of 3H-1,2-dithiole-3-thione derivatives
摘要:
As part of our project devoted to the search of new antifungal agents, we report here the in vitro-in vivo antifungal evaluations and a structure-activity relationship (SAR) study of 17 thione derivatives. Some compounds of this series exhibited remarkable antifungal activity against a broad spectrum of pathogenic opportunistic fungi. SAR studies provide a useful information for the determination of the minimum structural requirements for producing the biological response.
Histidine-Containing Peptide Catalysts Developed by a Facile Library Screening Method
作者:Kengo Akagawa、Nobutaka Sakai、Kazuaki Kudo
DOI:10.1002/anie.201410268
日期:2015.2.2
resin‐bound peptides through reductive amination to visualize active catalysts. This procedure allows for the monitoring of the reactivity of entire peptides without modifying the resin beads beforehand. Peptidescontaininghistidine at an appropriate position were identified by this method. A novel function of the histidyl residue, which enhances the binding of a substrate to the catalyst by capturing an iminium
Direct Catalytic Asymmetric Mannich Reaction with Dithiomalonates as Excellent Mannich Donors: Organocatalytic Synthesis of (<i>R</i>)-Sitagliptin
作者:Han Yong Bae、Mun Jong Kim、Jae Hun Sim、Choong Eui Song
DOI:10.1002/anie.201605167
日期:2016.8.26
enantioselectivity (up to 99 % ee). Furthermore, by the use of a DTM, even some highly challenging primary alkyl α‐amidosulfones were smoothly converted into the desired adducts with excellent enantioselectivity (up to 97 % ee), whereas the use of a malonate or monothiomalonate resulted in no reaction under identical conditions. The synthetic utility of the chiral Mannich adducts obtained from primary alkyl substrates
Water-Enabled Catalytic Asymmetric Michael Reactions of Unreactive Nitroalkenes: One-Pot Synthesis of Chiral GABA-Analogs with All-Carbon Quaternary Stereogenic Centers
作者:Jae Hun Sim、Choong Eui Song
DOI:10.1002/anie.201611466
日期:2017.2.6
new catalytic reactions for otherwise unreactive substrate systems. Under the “on water” reaction conditions, extremely unreactive β,β‐disubstituted nitroalkenes smoothly underwent enantioselective Michael addition reactions with dithiomalonates using a chiral squaramide catalyst, affording both enantiomers of highly enantioenriched Michael adducts with all‐carbon‐substituted quaternarycenters. The
Access to Chiral GABA Analogues Bearing a Trifluoromethylated All-Carbon Quaternary Stereogenic Center through Water-Promoted Organocatalytic Michael Reactions
作者:Jae Hun Sim、Jin Hyun Park、Pintu Maity、Choong Eui Song
DOI:10.1021/acs.orglett.9b02320
日期:2019.9.6
dithiomalonates. Under on-water conditions, the reaction rates were remarkably accelerated as a result of enforced hydrophobic interactions between catalysts and reactants. Takemoto-type thiourea catalysts are very effective for this transformation, affording highly enantioenriched Michael adducts that provide simple access to chiral γ-aminobutyric acid (GABA) analogues with a β-trifluoromethylated quaternary
베타-아미노-다이싸이오에스터 화합물의 제조방법 및 이에 의해 제조된 베타-아미노-다이싸이오에스터 화합물
申请人:Research & Business Foundation SUNGKYUNKWAN UNIVERSITY 성균관대학교산학협력단(220050013604) BRN ▼101-82-12009
公开号:KR20170093017A
公开(公告)日:2017-08-14
N-프로텍티드-베타-아미노-다이싸이오에스터 화합물의 제조방법이 개시된다. N-프로텍티드-베타-아미노-다이싸이오에스터 화합물을 제조하기 위하여, 스퀘어아마이드 작용기와 퀴누클리딘 작용기를 포함하는 키랄 촉매의 존재 하에 마니히 반응에 따라 다이싸이오말로네이트와 N-프로텍티드-이민 또는 N-프로텍티드-알파-아미도설폰를 비대칭 반응시킬 수 있다. 이러한 제조방법에 따르면, 종래의 금속 촉매에 비해 현저하게 저렴하고 안전한 촉매를 이용하여 높은 광학 선택성으로 키랄성 N-프로텍티드-베타-아미노-다이싸이오에스터를 높은 수율로 합성할 수 있다.