[EN] CHEMOSELECTIVE THIOL-CONJUGATION WITH ALKENE OR ALKYNE-PHOSPHONAMIDATES [FR] CONJUGAISON CHIMIOSÉLECTIVE D'UN THIOL AVEC DES ALCÈNE- OU ALCYNE-PHOSPHONAMIDATES
[EN] NEW TARGETED CYTOTOXIC RATJADONE DERIVATIVES AND CONJUGATES THEREOF<br/>[FR] NOUVEAUX DÉRIVÉS DE RATJADONE CYTOTOXIQUES CIBLÉS ET LEURS CONJUGUÉS
申请人:HELMHOLTZ ZENTRUM INFEKTIONSFORSCHUNG GMBH
公开号:WO2019030284A1
公开(公告)日:2019-02-14
The present invention is directed to novel natural product-derived ratjadone-based compounds useful as payloads (or toxins) in drug-conjugates constructs with cell target binding moieties (CTBM) and payload-linker compounds useful in connection with drug conjugates. The present invention further relates to new ratjadone compositions including the aforementioned payloads, payload-linkers and drug conjugates, and methods for using these payloads, payload-linkers and drug conjugates, to treat pathological conditions including cancer, inflammatory and infectious diseases.
Conjugates are provided which comprise a membrane permeable drug linked to a moiety that is not membrane permeable. Attachment of the moiety that is not membrane permeable prevents the drug from crossing cell membranes and entering cells. However, exposure to light either i) breaks the linkage, releasing the drug and allowing it to enter cells; or ii) converts the non-membrane permeable moiety to a membrane permeable form, allowing the entire conjugate to enter the cell, where the drug is released from the conjugate by cleavage. The membrane permeable drugs are thus delivered to cells at locations of interest, e.g. cancer cells in a tumor, in a temporally and spatially controlled manner.
Ethynylphosphonamidates for the Rapid and Cysteine‐Selective Generation of Efficacious Antibody–Drug Conjugates
作者:Marc‐André Kasper、Andreas Stengl、Philipp Ochtrop、Marcus Gerlach、Tina Stoschek、Dominik Schumacher、Jonas Helma、Martin Penkert、Eberhard Krause、Heinrich Leonhardt、Christian P. R. Hackenberger
DOI:10.1002/anie.201904193
日期:2019.8.19
from native non‐engineered monoclonal antibodiesthrough a simple one‐pot reduction and alkylation. Ethynylphosphonamidates can be easily substituted with hydrophilic residues, giving rise to electrophilic labeling reagents with tunable solubility properties. We demonstrate that ethynylphosphonamidate‐linked ADCs have excellent properties for next‐generation antibody therapeutics in terms of serum stability
A method for protecting organic azides from click reactions with alkynes is reported. Treatment of azides with Amphos affords phosphazides, which are stable under click reaction conditions and are easily converted back to azides by treatment with elemental sulfur. Thus, the method allows for facile modification of azide compounds via site-selective click reactions.
An adenosine 5′-triphosphate analogs modified at the gamma-phosphate with a reactive reagent. A method of forming the analog by activating a 4-amino benzoic acid, incubating the activated acid to obtain an amine, and coupling the amine with ATP in the presence of water soluble EDCI. A method of detecting the efficacy of a therapeutic by adding a gamma-phosphate modified ATP analog to a protein substrate, reacting the target proteins with the ATP analog, and analyzing the resulting cross-linked product, wherein the amount of product present correlates to the efficacy of the therapeutic is also provided.