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.
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.
Synthesis of Hydroxamic Esters via Alkoxyaminocarbonylation of β-Dicarbonyl Compounds
作者:Stephen Hanessian、Shawn Johnstone
DOI:10.1021/jo990353k
日期:1999.8.1
N-t-Butoxycarbonyl-O-sulfonyl-substitute hydroxylamines react with soft enolates to yield O-t-butoxycarbonylamino derivatives rather than the expected Boc-protected amino acids. The reaction is limited to enolates of beta-dicarbonyl compounds. Decarboxylation of the resultant tricarbonyl compound affords malonyl alpha-alkyl O-t-butoxycarbonylamino derivatives.
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.