Investigation for the cyclization efficiency of linear tetrapeptides: Synthesis of tentoxin B and dihydrotentoxin
作者:Ryota Sato、Kie Oyama、Hiroyuki Konno
DOI:10.1016/j.tet.2018.09.011
日期:2018.10
tentoxin B by the combination of Fmoc solid-phase peptide synthesis and cyclization in solution phase has been reported. An unusual aminoacid, an L-N-methyl-β-hydroxyphenylalanine derivative, which was assembled on solid support, was prepared from ethyl cinnamate. Cyclic tetrapeptide formation and cleavage of benzyl ether were optimized with DIPCI/HOBt/DIPEA and Et3SiH/Pd(OH)2, respectively.
The disclosure features macrocyclic compounds, and pharmaceutical compositions and protein complexes thereof, capable of inhibiting Ras proteins, and their uses in the treatment of cancers.
Highly enantioselective synthesis of anti aryl β-hydroxy α-amino esters via DKR transfer hydrogenation
作者:Zhuqing Liu、C.Scott Shultz、Candice A. Sherwood、Shane Krska、Peter G. Dormer、Richard Desmond、Claire Lee、Edward C. Sherer、Joseph Shpungin、James Cuff、Feng Xu
DOI:10.1016/j.tetlet.2011.01.146
日期:2011.4
aryl β-hydroxy α-amino esters via dynamic kineticresolution (DKR), asymmetric transfer hydrogenation of α-amino β-keto esters is described. The anti β-hydroxyl α-amino esters were obtained both in high yields and high diasteroselectivity. The observed high anti selectivity is inconsistent with the previous results in literature. The absolute stereochemistry of the aryl β-hydroxy α-amino esters was
[EN] COVALENT RAS INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE RAS COVALENTS ET LEURS UTILISATIONS
申请人:REVOLUTION MEDICINES INC
公开号:WO2021108683A1
公开(公告)日:2021-06-03
The disclosure features compounds, or pharmaceutically acceptable salts thereof, alone and in combination with other therapeutic agents, pharmaceutical compositions, and protein conjugates thereof, capable of modulating biological processes including Ras, and their uses in the treatment of cancers.
A straightforward enantiomerically pure synthesis of the heterocyclic core of the D-series GE2270 is reported. The synthetic strategy combines the Hantzsch thiazole's building condensation with a cross-coupling reaction including direct C-H hetarylation to build and connect step-by-step thiazolyl moieties to the 5-bromopicolinate as readily available starting material.