《One-Pot Synthesis of Dithioacetals and Diselenoacetals: An Indium-Catalyzed Reductive Insertion into Disulfides and Diselenides with Orthoesters as a Methylene Source》 was published in Asian Journal of Organic Chemistry in 2020. These research results belong to Sakai, Norio; Adachi, Shunpei; Ogawa, Sho; Takahashi, Kenshiro; Ogiwara, Yohei. Synthetic Route of Br3In The article mentions the following:
A variety of dithioacetal derivatives were synthesized effectively via indium(III) catalyzed reductive insertion into either diaryl or dialkyl disulfides with orthoesters. This method was also adapted to the diselenoacetalization of diselenides. During a series of reductive insertions using this method, its noteworthy that an orthoester functions as a masked methylene moiety. The experimental process involved the reaction of Indium(III) bromide(cas: 13465-09-3Synthetic Route of Br3In)
Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.Synthetic Route of Br3In
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary