Fluorous-Phase Approach to ?-Hydroxytropolone Synthesis.

ABSTRACT: ?-Hydroxytropolones (?HTs) are troponoids that demonstrate inhibition against an array of therapeutically significant targets, making them potential drug leads for several human diseases. We have utilized a recently discovered one-pot three-component oxidopyrylium cycloaddition in a solid-supported synthesis of ?HTs. Though the procedure is time efficient and generates assay-ready molecules, the system suffers from low yields and an inability to perform reaction modifications on resin-bound intermediates. In order to combat these issues with the solid-phase platform, we incorporated fluorous tags into our synthetic route. Through the implementation of fluorous phase chemistry, we demonstrate a substantial increase in the overall yield of ?HTs, as well as an ability to execute metal-catalyzed cross coupling and amide coupling on fluorous tagged intermediates. We also show that tagged molecules can be separated from nonfluorous impurities, and vice versa, by utilizing fluorous liquid-liquid and solid-phase extractions. Hence, these proof-of-principle investigations describe the viability of a fluorous phase approach to ?HT synthesis and its potential to serve as a combinatorial technique to produce structurally diverse substrates.

SUBMITTER: D'Erasmo MP 

PROVIDER: S-EPMC5859309 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature