The author of 《Selective synthesis of N-protected exo-spiro[oxirane-3,2′-tropanes]》 were Mandzhulo, Aleksandr; Vashchenko, Iryna; Gerasov, Andrii; Vovk, Mykhaylo; Rusanov, Eduard; Fetyukhin, Volodymyr; Lukin, Oleg; Shivanyuk, Alexander. And the article was published in Organic Chemistry Frontiers in 2019. HPLC of Formula: 1779-49-3 The author mentioned the following in the article:
N-Cbz- and N-Boc-protected exo-spiro[oxirane-3,2′-tropanes] were obtained in 62-75% yield via either epoxidation or hydroxybromination/dehydrobromination of the corresponding alkenes. Deprotection of the Cbz-exo-epoxide afforded the corresponding tropane containing an exo-oxirane fragment and a secondary amino group. In the experimental materials used by the author, we found Methyltriphenylphosphonium bromide(cas: 1779-49-3HPLC of Formula: 1779-49-3)
Methyltriphenylphosphonium bromide(cas: 1779-49-3) is an organophosphorus compound, with potential use as a precursor and a solvent in organic synthesis. And it is used widely for methylenation via the Wittig reaction.HPLC of Formula: 1779-49-3
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary