Synthesis, in Vitro and in Vivo Biological Evaluation, and Comprehensive Understanding of Structure−Activity Relationships of Dipeptidyl Boronic Acid Proteasome Inhibitors Constructed from β-Amino Acids
摘要:
An extensive structure-activity relationship (SAR) study of 72 dipeptidyl boronic acid proteasome inhibitors constructed from beta-amino acids is reported. SAR analysis revealed that bicyclic groups at the RI position, 3-F substituents at the R-2 position, and bulky aliphatic groups at the R-3 position were favorable to the activities. Enzymatic screening results showed that compound 78, comprising all of these features, was the most active inhibitor against the 20S human proteasome at less than a 2 nM level, as active as the marketed drug bortezomib. Cellular assays confirmed that compound 78 was the most potent against two hematologic and some solid tumor cells with IC50 values less than 1 mu M. Pharmacokinetic profiles suggested that 78 showed higher plasma exposure and a longer half-life than bortezomib.
Synthesis, in Vitro and in Vivo Biological Evaluation, Docking Studies, and Structure−Activity Relationship (SAR) Discussion of Dipeptidyl Boronic Acid Proteasome Inhibitors Composed of β-Amino Acids
A series of novel dipeptidyl boronic acid proteasome inhibitors composed of beta-amino acids were synthesized, in vitro and in vivo biologically evaluated, and theoretically modeled for the first time. From the screened racemic compounds in enzyme, 4i wits the most active. The IC50 value of its pure enantiomer 4q was 9.6 nM, 36-fold more active than its isomer 4p and as active its the marketed bortezomib in inhibiting human 20S proteasome. This candidate also showed good activities with IC50 values nearly less than 5 mu M against several human solid and hematologic tumor cell lines. Safety evaluation in vivo with zebrafish and Sprague-Dawley (SD) rats showed that the candidate 4q was less toxic than bortezomib. Pharmacokinetic profiles suggested candidate 4q showed a more plasma exposure and longer half-life than bortezomib. Docking results indicated that 4q nearly interacted with 20S proteasome in it similar way as bortezomib.
Kinetic Resolution of Oxazinones: An Organocatalytic Approach to Enantiomerically Pure β-Amino Acids
Kanewskaja; Jaskina, Zhurnal Obshchei Khimii, 1957, vol. 27, p. 68,70; engl. Ausg. S. 77, 79
作者:Kanewskaja、Jaskina
DOI:——
日期:——
Synthesis, in Vitro and in Vivo Biological Evaluation, and Comprehensive Understanding of Structure−Activity Relationships of Dipeptidyl Boronic Acid Proteasome Inhibitors Constructed from β-Amino Acids
An extensive structure-activity relationship (SAR) study of 72 dipeptidyl boronic acid proteasome inhibitors constructed from beta-amino acids is reported. SAR analysis revealed that bicyclic groups at the RI position, 3-F substituents at the R-2 position, and bulky aliphatic groups at the R-3 position were favorable to the activities. Enzymatic screening results showed that compound 78, comprising all of these features, was the most active inhibitor against the 20S human proteasome at less than a 2 nM level, as active as the marketed drug bortezomib. Cellular assays confirmed that compound 78 was the most potent against two hematologic and some solid tumor cells with IC50 values less than 1 mu M. Pharmacokinetic profiles suggested that 78 showed higher plasma exposure and a longer half-life than bortezomib.
Kinetic Resolution of Oxazinones: Rational Exploration of Chemical Space through the Design of Experiments
The organocatalytickineticresolution of 4‐substituted oxazinones has been optimised (selectivity factor S up to 98, chiral oxazinone ee values up to 99.6 % (1 a–g) and product ee values up to 90 % (3 a–g)) in a rational way by applying the Design of Experiments (DoE) approach.
对4-取代的恶嗪酮的有机催化动力学拆分进行了优化(选择性因子S最高为98,手性恶嗪酮ee值最高为99.6%(1 a – g),产物ee值最高为90%(3 a – g))。通过应用实验设计(DoE)方法的一种合理方法。