Dioxolane is a heterocyclic acetal with the formula (CH2)2O2CH2. It is related to tetrahydrofuran by exchanging an oxygen for the CH2 group. The isomer 1,2-dioxolane (in which the two oxygen centers are adjacent) is a peroxide. 1,3-Dioxolane is used as solvent and comonomer in polyacetal. The dioxolane-type and their hydrogenolysis can provide very valuable partially protected building blocks either for oligosaccharide syntheses or sugar transformations.
Genentech’s Phase III results show that the Inavolisib (GDC-0077) treatment meets the primary end point in hormone receptor (HR)-positive, HER2-negative, PIK3CA-mutated Breast Cancer. The combination of Inavolisib with Palbociclib and fulvestrant improves the progression-free survival (PFS) in the first line. Inavolisib is a potent selective inhibitor of PI3K alpha (PI3Kα) that binds to the ATP-binding site of p110α, and promotes the degradation of mutated p110α.