Endocyte, Inc.

Fei You

Christopher Paul Leamon

Iontcho Radoslavov Vlahov

Hari Krishna R Santhapuram

Paul Joseph Kleindl

Kevin Yu Wang

Le-Cun Xu

Katheryn Marie Stanford

Allen Ritter

Michael Groaning

Yingjuan June Lu

Yu Wang

Described herein are compositions and methods for use in targeted drug delivery using cell-surface receptor binding drug delivery conjugates containing hydrophilic spacer linkers for use in treating disease states caused by pathogenic cell populations.

Conjugates containing hydrophilic spacer linkers

Described herein are compositions, methods, compounds, conjugates, and kits for use in targeted drug delivery using drug delivery conjugates containing hydrophilic spacer linkers for use in treating disease states caused by pathogenic cell populations, such as inflammatory cells.

Vitamin receptor drug delivery conjugates for treating inflammation

The invention described herein pertains to processes for preparing tubulysin derivatives, conjugates of tubulysins, and intermediates therefore. In one illustrative embodiment of the invention, processes for derivatives or analogs of natural tubulysins including compounds of formula (T). In another embodiment, vitamin receptor binding conjugates of tubulysins are described. The processes include one or more steps described herein. In another embodiment, a process is described for preparing a compound of formula B, wherein R5 and R6 are as described in the various embodiments herein, such as each being independently selected from optionally substituted alkyl or optionally substituted cycloalkyl; and R8 is C1-C6 n-alkyl; wherein the process comprises the step of treating a compound of formula A with a silylating agent, such as triethylsilyl chloride, and a base, such as imidazole in an aprotic solvent.

Processes for preparing tubulysin derivatives and conjugates thereof

Tubulysins are a series of naturally occurring cytotoxic agents that are of interest as anticancer therapeutic agents. Processes and intermediates useful for preparing naturally occurring and non-naturally occurring tubulysins and analogs and derivatives thereof are described.

Processes for preparing tubulysins

Described herein are compositions and methods for use in targeted drug delivery using cell receptor binding drug delivery conjugates containing hydrophilic spacer linkers for use in imaging, diagnosing, and/or treating diseases and disease states caused by pathogenic cell populations.

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West Lafayette, IN, United States of America

Fei You