Treatment of the carbamate 2a by i-amyl nitrite and TMSCl in presence of a reduced amount of pyridine, followed by decomposition of the resulting nitroso derivative 3a with activated alumina afforded in high yield the pure, crystalline, diazosulfone la, a process which could be extended to the preparation of the parent diazosulfone Ib. (C) 2000 Elsevier Science Ltd. All rights reserved.
Treatment of the carbamate 2a by i-amyl nitrite and TMSCl in presence of a reduced amount of pyridine, followed by decomposition of the resulting nitroso derivative 3a with activated alumina afforded in high yield the pure, crystalline, diazosulfone la, a process which could be extended to the preparation of the parent diazosulfone Ib. (C) 2000 Elsevier Science Ltd. All rights reserved.