1225532-89-7Relevant articles and documents
Multigram Synthesis of Advanced 6,6-Difluorospiro[3.3]heptane-Derived Building Blocks
Olifir, Oleksandr S.,Chernykh, Anton V.,Dobrydnev, Alexey V.,Grygorenko, Oleksandr O.,Moroz, Yuriy S.,Voitenko, Zoia V.,Radchenko, Dmytro S.
, p. 6541 - 6550 (2021)
A convenient methodology for constructing 6,6-difluorospiro[3.3]heptane scaffold – a conformationally restricted isoster of gem-difluorocycloalkanes – is developed. A large array of novel 2-mono- and 2,2-bifunctionalized difluorospiro[3.3]heptane building blocks was obtained through the convergent synthesis strategy using a common synthetic precursor – 1,1-bis(bromomethyl)-3,3-difluorocyclobutane. The target compounds and intermediates were prepared by short reaction sequences (6–10 steps) on a multigram scale (up to 0.47 kg).
COMBINATIONS OF HEPATITIS C VIRUS INHIBITORS
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Page/Page column 703, (2015/02/02)
The present disclosure is generally directed to antiviral compounds, and more specifically directed to combinations of compounds which can inhibit the function of the NS5A protein encoded by Hepatitis C virus (HCV), compositions comprising such combinations, and methods for inhibiting the function of the NS5A protein.