[EN] PREPARATION OF MIXED AMIDOMAGNESIUM HALIDES<br/>[FR] PRÉPARATION D'HALOGÉNURES MIXTES D'AMIDOMAGNÉSIUM
申请人:TETRAPHASE PHARMACEUTICALS INC
公开号:WO2017117189A1
公开(公告)日:2017-07-06
A composition, comprising an amidomagnesium chloride represented by the following structural formula R1R2NMgCl, and an amidomagnesium bromide represented by the following structural formula R3R4NMgBr is disclosed. Values and example values of variables R1, R2, R3, and R4 are described herein. The disclosed mixed amidomagnesium halides show an increased solubility, high reactivity and regioselectivity in facilitating the reaction of directed metalation and subsequent functionalization of aryls and heteroaryls.
A Practical, Enantioselective Synthetic Route to a Key Precursor to the Tetracycline Antibiotics
作者:Jason D. Brubaker、Andrew G. Myers
DOI:10.1021/ol071377d
日期:2007.8.1
synthetic route to a key precursor to the tetracycline antibiotics is reported. The route proceeds in nine steps (21% yield) from the commercial substance methyl 3-hydroxy-5-isoxazolecarboxylate. Key steps in the route involve enantioselective addition of divinylzinc to 3-benzyloxy-5-isoxazolecarboxaldehyde and an endo-selective intramolecular furan Diels-Alder cycloaddition reaction. The route described
[EN] DIELS-ALDER CONJUGATION METHODS<br/>[FR] PROCÉDÉS DE CONJUGAISON DE DIELS-ALDER
申请人:REGENERON PHARMA
公开号:WO2021211984A1
公开(公告)日:2021-10-21
Described herein are protein-payload conjugates and compositions thereof that are useful, for example, for target-specific delivery of therapeutic and/or imaging agent moieties. In certain embodiments, provided are specific and efficient methods for producing protein-payload constructs (e.g., antibody-drug conjugates) utilizing a combination of transglutaminase and Diels-Alder techniques. Antibody-drug conjugates and compositions which comprise glutaminyl-modified antibodies, Diels-Alder adducts, and reactive payloads and are provided.
The aza‐Piancatelli cyclization provides a rapid and practical route to densely functionalized 4‐aminocyclopentenones from biomass‐derived 2‐furylcarbinols. Through a better understanding of the scope and limitations of this reaction, a 3‐step synthesis of bruceolline D was achieved.
Process Research and Development of TP-808: A Key Intermediate for the Manufacture of Synthetic Tetracyclines
作者:Wu-Yan Zhang、Chi-Li Chen、Minsheng He、Zhijian Zhu、Philip Hogan、Olga Gilicky、Nicholas Dunwoody、Magnus Ronn
DOI:10.1021/acs.oprd.7b00003
日期:2017.3.17
Process research, development, and manufacture of TP-808 (1), a key intermediate for the discovery and manufacture of tetracycline analogues, is described. The process used for the preparation of 1 avoids chromatographic purifications and has been substantially improved over the previously reported preparation. The robustness of the process was demonstrated in a 76.1 kg manufacturing campaign with