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.
One-Pot Synthesis of 5-Alkylthio-3H-1,2-dithiole-3-thiones: Advantages and Scopes
作者:Mario L. Aimar、Rita H. de Rossi
DOI:10.1055/s-2000-8202
日期:——
The reaction of dialkyl malonate esters with P 2S5/S8 in boiling xylene in the presence of 2-mercaptobenzothiazole/ZnO as catalyst produces 5-alkylthio-3 H-1,2-dithiole-3-thiones as major identifiable product. Moderate yields were obtained with malonate esters of primary alcohols. The reaction fails with malonate esters of secondary alcohols. Regarding the substituent in position two, di- alkyl malonates
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
2-Carboxyethanethioic S-esters(RSCOCH2COOH) and propanebis(thioic) S,S′-diesters (RSCOCH2COSR) were easily prepared in high yields by the direct condensation of malonicacid with thiols in the presence of ethyl polyphosphate (PPE).
Closed-loop recyclable and biodegradable thioester-based covalent adaptable networks
作者:Pralay Ranjan Maity、Chandan Upadhyay、A. S. K. Sinha、Umaprasana Ojha
DOI:10.1039/d3cc00181d
日期:——
Closed-loop recyclable and biodegradable aliphatic covalentadaptablenetworks (CANs) based on dynamic β-CO thioester linkages that exhibit a service temperature beyond 100 °C are reported. These CANs possessing tensile strength and modulus values of up to 0.3 and 3 MPa, respectively, effectively undergo stress relaxation above 100 °C. The samples exhibit creep resistance ability and low hysteresis
报道了基于动态 β-CO 硫酯键的闭环可回收和可生物降解的脂肪族共价适应性网络 (CAN),其工作温度超过 100 °C。这些 CAN 的拉伸强度和模量值分别高达 0.3 和 3 MPa,在 100 °C 以上有效地承受应力松弛。样品表现出抗蠕变能力和低滞后损失,并可在 120 °C 下重复再加工。这些 CAN 在温和条件下可解聚为单体,并在自然生物降解条件下约 35 天内失去显着的机械强度 (92.4%) 和重量 (76.5%)。
Dashkevich,L.B.; Pechenyuk,V.A., Journal of Organic Chemistry USSR (English Translation), 1967, vol. 3, p. 609 - 610