2-Nitroaryldifurylmethanes 1a and 1b. readily available by condensation of 2-nitrobenzaldehyde and 6-nitroveratraldehyde with 2-methylfuran. were transformed into indole. cinnoline and benzothiazine-3. https://www.foldlyers.shop/product-category/linker-modules-and-shields/