380383-84-6Relevant articles and documents
Synthesis of N-aryl hydrazides by copper-catalyzed coupling of hydrazides with aryl iodides.
Wolter,Klapars,Buchwald
, p. 3803 - 3805 (2001)
[reaction--see text] A convenient method for intermolecular N-arylation of hydrazides with substituted aryl iodides in the presence of a copper catalyst and Cs(2)CO(3) is reported. The C-N coupling of N-Boc hydrazine with para- and meta-substituted aryl iodides afforded the N-arylated products A, regioselectively. A reversal in regioselectivity is observed for the arylation of benzoic hydrazide with ortho-substituted aryl iodides, providing the N'-arylated products B.
Aza-amino acid derivatives (factor Xa inhibitors 15)
-
, (2008/06/13)
The invention relates to semicarbazides of the general formula I where R1, R2, R3, R4 and I have the meaning indicated in claim 1. The compounds of the formula I can be employed as pharmaceutical active compound