Pyrromethene–BF2 complexes as laser dyes:1.

Abstract Condensations between 3‐X‐2,4‐dimethylpyrroles (X = H, CH 3 , C 2 H 5 , and CO 2 C 2 H 5 ) and acyl chlorides gave derivatives of 3,5,3′,5′‐tetramethylpyrromethene (isolated as their hydrochloride salts): 6‐methyl, 6‐ethyl, 4,4′,6‐trimethyl, 4,4′‐diethyl‐6‐methyl, and 4,4′‐dicarboethoxy‐6‐e... View More