Yes, what about it? Hasn't various syntheses & trip reports been posted here over the years?
Here are a few related preparations:
2-Iodomescaline: J. Labelled Compd. Radiopharm. 41(1), 53-62 (1998)
2-Bromomescaline: J. Org. Chem. 24, 917 (1959) (https://www.thevespiary.org/rhodium/Rhodium/pdf/2-bromomescaline.pdf)
(https://www.thevespiary.org/rhodium/Rhodium/pdf/2-bromomescaline.pdf)
2,6-Dibromomescaline: Ber. 31, 1196 (1898)
2-Chloromescaline: Bioorg. Med. Chem. 10(11) 3555-3564 (2002)
Adapted from a very closely related compound:
To [Mescaline HCl] (0.1 mmol) in MeOH (3 mL) was added concentrated HCl (33 mL, 0.4 mmol). The solution was cooled to 0°C and a 90% aqueous solution of t-butyl hydroperoxide (44 mL, 0.4 mmol) was added. The resulting solution was refluxed overnight. Following cooling and removal of the solvent, the product (72%) was isolated by column chromatography.
Instead of the chromatography, an acid/base extraction, followed by gassing of the freebase with HCl and recrystallization (to remove unreacted Mescaline) can be used to purify the compound.