Many examples of solid-state photoreactions using chiral crystals composed of achiral materials and leading to optically active products have been successfully demonstrated and recognized as absolute asymmetric synthesis. Recently, we have discovered a new methodology for asymmetric synthesis using the molecular chirality in crystal as a source of homochirality in fluid media. The chirality can be effectively transferred to optically active products by asymmetric reactions involving nucleophilic reactions and an intermolecular photochemical reaction, and which had so far not been achieved in solid state reactions.
