Synthesis of substituted N-hydroxyureas via the in situ generation of t-butoxy isocyanate
摘要:
Treatment of primary and secondary amines with tert-butylmesitylenesulfonoxycarbamate and a base afforded tert-butoxyurea, which when treated with an acid ultimately yielded substituted N-hydroxy ureas. It is proposed that this proceeded via the generation of t-butoxy isocyanate in situ. This method allows for the synthesis of both mono and disubstituted N-hydroxyureas. (C) 2010 Elsevier Ltd. All rights reserved.
Formation of Complex Hydrazine Derivatives via Aza-Lossen Rearrangement
作者:Dilan E. Polat、David D. Brzezinski、André M. Beauchemin
DOI:10.1021/acs.orglett.9b01742
日期:2019.6.21
The development of a broadly applicable procedure for the aza-Lossen rearrangement is reported. This process converts amines into complexhydrazinederivatives in two steps under safe, mild conditions. This method allows the chemoselective formation of N–N bonds, resulting in the synthesis of cyclic and acyclic products while avoiding side reactions of the amphoteric (ambident) nitrogen-substituted
Synthesis of substituted N-hydroxyureas via the in situ generation of t-butoxy isocyanate
作者:Josef G. Krause、Brian D. Leskiw、Michelle L. Emery、Megan E. McGahan、Mary P. McCourt、Ronny Priefer
DOI:10.1016/j.tetlet.2010.05.002
日期:2010.7
Treatment of primary and secondary amines with tert-butylmesitylenesulfonoxycarbamate and a base afforded tert-butoxyurea, which when treated with an acid ultimately yielded substituted N-hydroxy ureas. It is proposed that this proceeded via the generation of t-butoxy isocyanate in situ. This method allows for the synthesis of both mono and disubstituted N-hydroxyureas. (C) 2010 Elsevier Ltd. All rights reserved.