In recent years,
the urgency to replace fossil-based resources
by renewable biomass for obtaining chemical building blocks has only
increased. Carbohydrate-derived furanic compounds are regarded as
promising platforms for a renewable value chain. The high reactivity
of such biobased intermediates requires the development of novel catalytic
chemistry to enhance product yield. The protection of reactive functional
groups provides a way to improve the product selectivity. Such protection
strategies are common practice in the synthesis of fine chemicals
and pharmaceuticals but are not fully explored for the conversion
of furanic compounds. In this perspective, several examples of protection
strategies focusing on the selective passivation of 5-HMF are discussed.
Formation and removal of these protection groups are highlighted as
well as the application of the neutralized 5-HMF in further processing.
A guide for selecting the appropriate protection strategy depending
on the targeted chemistry and operating conditions is provided.
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