Description General description 5-Chloro-2-methylene-1,3,3-trimethylindoline undergoes regiospecific 1,3-dipolar cycloaddition reaction with arylnitriloxydes and N-phenylarylnitrilimines. Application 5-Chloro-2-methylene-1,3,3-trimethylindoline was used in the synthesis of 5′,6-dichloro-1′,3′,3′-trimethyl­spiro­[2H-1-benzopyran-2,2′-indoline]. Packaging 25 g in glass bottle