1079307-01-9Relevant articles and documents
Macrocyclic Peptides that Selectively Inhibit the Mycobacterium tuberculosis Proteasome
Zhang, Hao,Hsu, Hao-Chi,Kahne, Shoshanna C.,Hara, Ryoma,Zhan, Wenhu,Jiang, Xiuju,Burns-Huang, Kristin,Ouellette, Tierra,Imaeda, Toshihiro,Okamoto, Rei,Kawasaki, Masanori,Michino, Mayako,Wong, Tzu-Tshin,Toita, Akinori,Yukawa, Takafumi,Moraca, Francesca,Vendome, Jeremie,Saha, Priya,Sato, Kenjiro,Aso, Kazuyoshi,Ginn, John,Meinke, Peter T.,Foley, Michael,Nathan, Carl F.,Darwin, K. Heran,Li, Huilin,Lin, Gang
supporting information, p. 6262 - 6272 (2021/05/29)
Treatment of tuberculosis (TB) currently takes at least 6 months. Latent Mycobacterium tuberculosis (Mtb) is phenotypically tolerant to most anti-TB drugs. A key hypothesis is that drugs that kill nonreplicating (NR) Mtb may shorten treatment when used in combination with conventional drugs. The Mtb proteasome (Mtb20S) could be such a target because its pharmacological inhibition kills NR Mtb and its genetic deletion renders Mtb unable to persist in mice. Here, we report a series of macrocyclic peptides that potently and selectively target the Mtb20S over human proteasomes, including macrocycle 6. The cocrystal structure of macrocycle 6 with Mtb20S revealed structural bases for the species selectivity. Inhibition of 20S within Mtb by 6 dose dependently led to the accumulation of Pup-tagged GFP that is degradable but resistant to depupylation and death of nonreplicating Mtb under nitrosative stress. These results suggest that compounds of this class have the potential to develop as anti-TB therapeutics.
One-pot synthesis of Weinreb amides employing 3,3-dichloro-1,2-diphenylcyclopropene (CPI-Cl) as a chlorinating agent
Shekharappa,Roopesh Kumar,Sureshbabu, Vommina V.
, p. 790 - 798 (2019/03/26)
The synthesis of Nα-protected amino alkyl Weinreb amides starting from the corresponding α-amino acids as well as carboxylic acids has been delineated through the in situ generation of acid chlorides using CPI-Cl as a chlorinating agent. The protocol is simple; the reaction conditions employed were mild, and compatible with all the three commonly used urethane protecting groups namely, Boc, Cbz and Fmoc groups. The resulting Weinreb amides are obtained in good yields as optically pure products.