I have posted details on how to deprotect using HBr/Phenol in Post 339848 (https://www.thevespiary.org/talk/index.php?topic=12223.msg33984800#msg33984800)
(Rhodium: "Sulfonamide cleavage", Novel Discourse)
The correct reference for the JOC article mentioned in Post 369990 (https://www.thevespiary.org/talk/index.php?topic=11340.msg36999000#msg36999000)
(otto: "concerning: aziridines", Novel Discourse) is as follows:
Desulfonylation of chiral N-sulfonyl aziridines
Alonso DA. Anderson PG.
J. Org. Chem. 63, 9455 (1988)
DOI:10.1021/jo9815296 (http://dx.doi.org/10.1021/jo9815296)
(https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000369990-file_wxpa.gif)
The reaction is performed with Mg/MeOH. With stirring the yield is ~55% and with ultrasound ~78%.