2,4-Disubstituted N-tosylpyrrolidines were prepared from olefins via N-tosylaziridination, benseneselenolate ring-opening and reductive radical cyclization. Azidoselenation of olefins, followed by reduction, N-tosylation, N-allylation and reductive radical cyclization, afforded 3,4-disubstituted N-tosylpyrrolidines. (C) 1998 Elsevier Science Ltd. All rights reserved.
Copper-Catalyzed Ring-Opening Reactions of Alkyl Aziridines with B2pin2: Experimental and Computational Studies
作者:Lucilla Favero、Andrea Menichetti、Cosimo Boldrini、Lucrezia Margherita Comparini、Valeria Di Bussolo、Sebastiano Di Pietro、Mauro Pineschi
DOI:10.3390/molecules26237399
日期:——
bonds with aziridines using diboron derivatives continues to be a particularly challenging field in view of the direct preparation of functionalized β-aminoboronates, which are important compounds in drug discovery, being a bioisostere of β-aminoacids. We now report experimental and computational data that allows the individuation of the structural requisites and of reaction conditions necessary to open
AbstractA catalytic methodology involving terminal alkynes, elemental sulfur, and three-membered heterocycles has been described. This domino transformation serves as a useful method for the synthesis of oxathiolane and thiazolidine derivatives from the readily available starting materials. In situ generated copperacetylides reacted with elemental sulfur and oxiranes or aziridines in the presence
A tandem process for the synthesis of β-aminoboronic acids from aziridines with haloamine intermediates
作者:Subin Park、Jangwoo Koo、Weonjeong Kim、Hong Geun Lee
DOI:10.1039/d2cc00808d
日期:——
An unprecedented synthetic strategy is devised to generate β-aminoboronic acids from aziridines via a sequential process involving 1,2-iodoamine formation and radical borylation under light irradiation. A variety of aziridines including multiply substituted aziridines have been successfully employed as synthetic precursors, expanding their synthetic utility compared to previous methods. Mechanistic
Direct Trifluoromethylthiolation of Aziridines: Cation-Controlled Diverse Synthesis of Trifluoromethylthiolated Isothiocyanates and Amines
作者:Jingrui Xin、Tengying Chen、Pingping Tang
DOI:10.1021/acs.orglett.2c00558
日期:2022.3.18
The direct trifluoromethylthiolation of aziridines with AgSCF3 and iodides is reported. The β-trifluoromethylthiolated isothiocyanates and amines were selectively obtained by the changed cation of iodide. This strategy is tolerant to a wide range of functional groups with good yields and regioselectivities. In addition, the isothiocyanates can be used for further synthetic manipulation, which offered
Silver-Catalyzed Trifluoromethoxylation of Aziridines
作者:Jingrui Xin、Xiangyu Deng、Pingping Tang
DOI:10.1021/acs.orglett.1c04226
日期:2022.1.28
We disclose a silver-catalyzed trifluoromethoxylation of N-tosyl aziridines with trifluoromethyl arylsulfonate. The protocol is characterized by its mild conditions, simple operations, and good chemo- and regioselectivity. In addition, the trifluoromethoxylation of trisubstituted aziridines could construct C-OCF3 quaternary centers exclusively, which is quite rare. This method unlocks a new catalytic