Tetrahedron (2021)
Update date:2022-08-16
Topics:
Koenig, Stefan G.
Green, Keena L.
Müller, Barbara
Sowell, C. Gregory
Askin, David
Gosselin, Francis
A practical route to PI3K α-selective inhibitor GDC-0326 is reported. The synthesis leverages an existing scheme to a key tetracyclic benzoxazepine intermediate and optimizes it for robustness and scalability, including removing numerous undesired conditions and reagents, as well as eliminating chromatographic purification steps. The process endgame is streamlined to utilize a single-step, stereocontrolled alkylation of the key phenol with a chiral lactamide mesylate, followed by recrystallization of the lactamide ether product, to deliver the desired enantiomer of the active pharmaceutical ingredient (API) GDC-0326.
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