“…However, attempts have been made with reagents such as hydroxyl ammonium salts, [566][567][568][569][570][571] hydroxylamine-O-sulfonic acid, 572,573 hydrazoic acid, [574][575][576] and organic azides, [577][578][579][580] mostly under Lewis acid-catalyzed conditions (and also with thermal initiation [581][582][583][584][585][586][587] or photolysis 588,589 ). However, attempts have been made with reagents such as hydroxyl ammonium salts, [566][567][568][569][570][571] hydroxylamine-O-sulfonic acid, 572,573 hydrazoic acid, [574][575][576] and organic azides, [577][578][579][580] mostly under Lewis acid-catalyzed conditions (and also with thermal initiation [581][582][583][584][585][586][587] or photolysis 588,589 ).…”