Photoinitiated Reactions of Homoadamantane‐4,5‐Dione

New derivatives containing a homoadamantane framework have been obtained by photochemical reactions of homoadamantane‐4,5‐dione with various reagents. It has been found that products of photoaddition to the carbonyl group are formed in most of the reactions. When using benzaldehyde, dimethylformamide, isobutyric aldehyde, and salicylic aldehyde, additional formation of ester derivatives was observed. When using dioxane as a reagent, the formation of a mixture of diastereomers was detected. In the case of norbornene, the product of the Paterno‐Buchi reaction and a side compound of norbornene dichloromethylation were formed. The presented methods make it possible to obtain these substances in a fairly convenient and chemically accessible way. The obtained compounds present a prospect for further transformations