Cyclization of Chlorosulfonyl Isocyanate with Phenylhydrazones: A Synthetic Route to Triazinonoxathiazinedioxides and Triazinones
作者:Joseph Daniel、D. N. Dhar
DOI:10.1080/00397919108021070
日期:1991.8
Abstract A convenient synthetic route is reported for the preparation of aroyl substituted triazinones and triazinono-xathiazinedioxides by the interaction of chlorosulfonylisocyanate and phenylhydrazones (derived from acetylacetone, 1-benzoylacetone and dibenzoylmethane).
Photoisomerisation d'arylhydrazones-2 de dicetones-1,2 substituees en 2.
作者:R. Pichon、J. Le Saint、P. Courtot
DOI:10.1016/s0040-4020(01)92091-5
日期:1981.1
A syn-anti photoisomerisation of the carbon-nitrogendoublebond is responsible for the photochromic properties observed with 2-arylhydrazones of 2-substituted 1,2-diketones. We have determined the multiplicity of the excited state involved in the process and we have shown that, in the thermal back-reaction, syn-anti isomerisation takes place through rotation around the CN bond rather than through
Pyridine‐Catalysed Desulfonylative Addition of β‐Diketones to Arylazosulfones via Diaziridine Rearrangement
作者:Xin Ji、Ling‐Guo Meng、Hailong Xu、Lei Wang
DOI:10.1002/adsc.202001171
日期:2021.2.16
pyridine‐catalysed desulfonylative addition of β‐diketones to arylazosulfones was developed to obtain diazenyl β‐dicarbonyl compounds. The aryldiazenyl group was observed in the desired product from arylazosulfones, and this diazenylation reaction was achieved via a possible rearrangement process based on diaziridine ring cleavage. The scope of the protocol was investigated and a plausible mechanism was