Fig. 2: Chemical synthesis of sporopollenin analogues.
From: Sporopollenin-inspired design and synthesis of robust polymeric materials

A Simplified sporopollenin analogue 6–18 synthesis, B synthetic preparation of substituted crosslinker 25, and C summary of potential crosslinker analogue route divergence (teal/green: linker length modifiable via selection of cyclic ketone and bromoalkene, red: stereochemistry set via enantioselective alkylation or ring expansion, blue: heteroatom altered via selection of ring expansion conditions, purple: substituent varied via esterifications, amide couplings, alkylations, inter alia).