huotokuromitsuku characteristic chemical compound and its production method

摘要

NEW MATERIAL:A compound expressed by formula I {formula II represents (substituted) adamantylidene or (substituted) norbornylidene; R1 represents (substituted) hydrocarbon or (substituted) heteroring; X represents O or N-R2 [R2 represents H or (substituted) hydrocarbon]; formula III represents (substituted) unsaturated heteroring containing only one selenium atom as a heteroatom forming the ring}. EXAMPLE:A compound expressed by formula IV. USE:A photochromic compound, which is sufficiently chromogenic even at higher temperatures than ambient temperature. PREPARATION:A compound expressed by formula V is reacted with a compound expressed by formula VI (R3 and R4 represent alkyl) and converted into an acid anhydride, directly or reacted with an amino compound and subjected to cyclizing reaction.