28332-81-2Relevant articles and documents
Tuning the Circular Dichroism and Circular Polarized Luminescence Intensities of Chiral 2D Hybrid Organic–Inorganic Perovskites through Halogenation of the Organic Ions
Chao, Yu-Chiang,Chen, Deng-Gao,Chiu, Ching-Wen,Chou, Pi-Tai,Lin, Jin-Tai,Lin, Tai-Chun,Liu, Yi-Hung,Yang, Lan-Sheng
supporting information, p. 21434 - 21440 (2021/08/20)
Through the incorporation of various halogen-substituted chiral organic cations, the effects of chiral molecules on the chiroptical properties of hybrid organic–inorganic perovskites (HOIPs) are investigated. Among them, the HOIP having a Cl-substituted chiral cation exhibits the highest circular dichroism (CD) and circular polarized luminescence (CPL) intensities, indicating the existence of the largest rotatory strength, whereas the F-substituted HIOP shows the weakest intensities. The observed modulation can be correlated to the varied magnetic transition dipole of HOIPs, which is sensitive to the d-spacing between inorganic layers and the halogen–halogen interaction between organic cations and the inorganic sheets. These counteracting effects meet the optimal CD and CPL intensity with chlorine substitution, rendering the rotatory strength of HOIPs arranged in the order of (ClMBA)2PbI4>(BrMBA)2PbI4>(IMBA)2PbI4>(MBA)2PbI4>(FMBA)2PbI4.
Diastereoselective synthesis of polyfluoroalkylated α-aminophosphonic acid derivatives
Stanko, Oleg V.,Rassukana, Yuliya V.,Zamulko, Kateryna A.,Dyakonenko, Viktoriya V.,Shishkina, Svitlana V.,Onys'ko, Petro P.
, p. 47 - 56 (2018/10/21)
The asymmetric synthesis of biorelevant aminophosphonates and aminophosphonic acids bearing trifluoromethyl, tetrafluoroethyl, perfluoropropyl or chlorodifluoromethyl group in the α-position to phosphonyl group is developed. Diastereoselective reduction o
Acetic acid as a catalyst for the N-acylation of amines using esters as the acyl source
Sanz Sharley, Daniel D.,Williams, Jonathan M. J.
supporting information, p. 2020 - 2023 (2017/02/15)
We report a cheap and simple method for the acetylation of a variety of amines using catalytic acetic acid and either ethyl acetate or butyl acetate as the acyl source. Catalyst loadings as low as 10 mol% afforded acetamide products in excellent yields at temperatures ranging from 80-120 °C. The methodology can also be successfully applied for the synthesis of a broad range of other amides, including the formation of formamides at 20 °C.