Modular, One-Pot, Sequential Aziridine Ring Opening–SNAr Strategy to 7-, 10-, and 11-Membered Benzo-Fused Sultams
摘要:
The generation of common and stereochemically rich medium-sized benzo-fused sultams via complementary pairing of heretofore-unknown (o-fluoroaryl)sulfonyl aziridine building blocks with an array of amino alcohols/amines in a modular one-pot, sequential protocol using an aziridine ring opening and intramolecular nucleophilic aromatic substitution is reported. The strategy employs a variety of amino alcohols/amines and proceeds with 6 + 4/6 + 5 and 6 + 1 cycloetherification pathways in a highly chemo- and regioselective fashion to obtain skeletally and structurally diverse, polycyclic, 10- to 11- and 7-membered benzo-fused sultams for broad-scale screening.
Efficient Synthesis of Taurine and Structurally Diverse Substituted Taurines from Aziridines
作者:Libo Hu、Hui Zhu、Da-Ming Du、Jiaxi Xu
DOI:10.1021/jo070470c
日期:2007.6.1
Taurine and substituted taurines were synthesized efficiently from aziridines via ring-opening reaction with thioacetic acid, oxidation with performic acid, and hydrolysis in hydrochloric acid. The current method shows more benefit in purification and efficiency in the preparation of taurine and structurally diverse 2-substituted, 2,2-disubstituted, and 1,2-, 2,2-, and 2,N-alkylene taurines.
Sulfur, selenium and tellurium containing amines act as effective carbonic anhydrase activators
作者:Damiano Tanini、Antonella Capperucci、Claudiu T. Supuran、Andrea Angeli
DOI:10.1016/j.bioorg.2019.03.062
日期:2019.6
A new series of β-aminochalcogenides were designed and synthesized to identify new carbonic anhydrase activator (CAA) agents as novel tools for the management of several neurodegenerative and metabolic disorders which represent a clinical challenge without effective therapies available. Some β-aminoselenides and β-aminotellurides showed effective CA activating effects and a potent antioxidant activity
An Improved and Mild Wenker Synthesis of Aziridines
作者:Jiaxi Xu、Xinyao Li、Ning Chen
DOI:10.1055/s-0030-1257913
日期:2010.10
The conventional Wenker synthesis of aziridines from vicinal amino alcohols has been modified by employing mild reaction conditions. Amino alcohols were converted into their hydrogen sulfates with chlorosulfonic acid. The sulfates were cyclized with sodium hydroxide, and even with non-nucleophilic sodium carbonate. The current, improved method extends the scope of the typical Wenker synthesis and is
Enantioselective Synthesis and Stereoselective Ring Opening of<i>N</i>-Acylaziridines
作者:Jennifer Cockrell、Christopher Wilhelmsen、Heather Rubin、Allen Martin、Jeremy B. Morgan
DOI:10.1002/anie.201204224
日期:2012.9.24
Kinetic resolution of N‐acylaziridines by nucleophilic ringopening was achieved with (R)‐BINOL as the chiral modifier under boron‐catalyzed conditions (see scheme; Ar=3,5‐dinitrophenyl). The consumed enantiomer of aziridine can be further converted to an enantioenriched 1,2‐chloroamide with recovery of (R)‐BINOL.
A Versatile Synthesis of Various Substituted Taurines from Vicinal Amino Alcohols and Aziridines
作者:Ning Chen、Weiyi Jia、Jiaxi Xu
DOI:10.1002/ejoc.200900759
日期:2009.11
Taurine and structurally diverse substituted taurines have been synthesized by peroxyformic acid oxidation of the thiazolidine-2-thione intermediates generated from vicinal amino alcohols or aziridines and carbon disulfide. Thestereochemistry and mechanisms of the reactions are disscussed. The method is a salt-free and versatile route, convenient in terms of purification, and can be used to synthesize