Non-natural azetidine-based amino acids (Aze) present interesting features in protein engineering. A simple organometallic route toward unsaturated carboxylic acid precursors is presented. Subsequent metal-catalyzed asymmetric reduction allowed for the synthesis of a new library of 2-azetidinylcarboxylic acids, which were finally employed in the formation of small peptide chains.
Herein, we describe an N-heterocycliccarbene (NHC)-catalyzed deconstructive isomerization of azetidinols via an inert C–C bond cleavage. It provides a direct and supplementary pathway to access α-amino ketone and oxazol-2-one derivatives in moderate to good yields. DFT calculation supports the proposed mechanism in which NHC undergoes a concerted proton transfer and ring-opening process. This reaction
3-Aryl-3-arylmethoxyazetidines. A new class of high affinity ligands for monoamine transporters
作者:Amber Thaxton、Sari Izenwasser、Dean Wade、Edwin D. Stevens、David L. Mobley、Vivian Jaber、Stacey A. Lomenzo、Mark L. Trudell
DOI:10.1016/j.bmcl.2013.05.071
日期:2013.8
A series of 3-aryl-3-arylmethoxy-azetidines were synthesized and evaluated for binding affinities at dopamine and serotonin transporters. The 3-aryl-3-arylmethoxyazetidines were generally SERT selective with the dichloro substituted congener 7c (K-i = 1.0 nM) and the tetrachloro substituted derivative 7i (K-i = 1.3 nM) possessing low nanomolar affinity for the SERT. The 3-(3,4-dichlorophenyl-3-phenylmethoxyazetidine (7g) exhibited moderate affinity at both DAT and SERT transporters and suggests that substitution of the aryl rings can be used to tune the mononamine transporter affinity. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis of Simple 3,3-Diarylazetidines from <i>N</i>-Boc-3-arylazetidinols Using Friedel–Crafts Arylation Conditions
作者:Madhurima Das、Amber Weissenfluh、Nam Ly、Mark L. Trudell
DOI:10.1021/acs.joc.0c00454
日期:2020.6.19
A synthesis of 3,3-diarylazetidines from N-Boc-3-aryl-3-azetidinols using Friedel-Crafts arylation conditions with AlCl3 is described. A series of substituted diarylazetidines were readily prepared and isolated as the oxalate salts in high yield and high purity. The 3,3-diarylazetidine oxalates were then easily converted into N-allcyl and N-acyl analogues (RX, NaHCO3/DMF/100 degrees C) in high overall yields.