Xu, Shiyan published the artcileReagent Control Enables Selective and Regiodivergent Opening of Unsymmetrical Phenonium Ions, Synthetic Route of 620-20-2, the publication is Journal of the American Chemical Society (2020), 142(18), 8090-8096, database is CAplus and MEDLINE.
The first examples of selective and regiodivergent chlorination of unsym. benzyl-substituted epoxides, I [R = 4-methoxyphenyl, Ph, 2H-1,3-benzodioxol-5-yl, 1-[(4-methylbenzene)sulfonyl]-2,3-dihydro-1H-indol-5-yl, etc.; R1 = Pr, 4-methoxyphenyl, 4-cyanobutyl, 4-(benzyloxy)butyl, etc.] have been reported. These reactions are enabled by the dual role of SnCl4 and TiCl4 as Lewis acids and chloride nucleophiles. Reagent control dictates addition of chloride at either the substituted internal position (SnCl4) or unsubstituted terminal position (TiCl4) of the phenonium ion. These reactions are highly selective, stereospecific, and operationally simple, and proceed in good to excellent yields. Diverse product utility is demonstrated.
Journal of the American Chemical Society published new progress about 620-20-2. 620-20-2 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 3-Chlorobenzylchloride, and the molecular formula is C7H5Br2F, Synthetic Route of 620-20-2.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics