57699-97-5Relevant academic research and scientific papers
Preparation of Multiply Protected Alkylhydrazine Derivatives by Mitsunobu and PTC Approaches
Brosse, Nicolas,Pinto, Maria-Fatima,Jamart-Gregoire, Brigitte
, p. 4757 - 4764 (2007/10/03)
Alkylation reactions of hydrazine derivatives by Mitsunobu or PTC approaches are described. It has been shown that aminophthalimide derivatives are better acidic partners than their aminoimidodicarbonate (NBoc2) analogues, the presence of the phthaloyl group increasing the acidity of the sole proton and concomitantly reducing steric hindrance. Moreover, N-aminophthalimide derivatives can be efficiently converted into the corresponding N-amino-imidodicarbonates by a three-stage, one-flask procedure under very mild conditions. These procedures can also be efficiently used for the preparation of orthogonally Nα,Nβ -diprotected α-hydrazino esters. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003).
Very efficient one-pot conversion of N-aminophthalimide derivatives into the corresponding N-amino-di-tert-butyl imidodicarbonates
Brosse, Nicolas,Jamart-Grégoire, Brigitte
, p. 249 - 251 (2007/10/03)
The phthaloyl group can be efficiently converted in very mild conditions into bis-tert-butyloxycarbonyl group using MeNH2, then Boc2O/DMAP, in a one-flask protocol.
Mild, efficient cleavage of arenesulfonamides by magnesium reduction
Nyasse, Barthelemy,Grehn, Leif,Ragnarsson, Ulf
, p. 1017 - 1018 (2007/10/03)
The cleavage of arenesulfonamides via N-arenesulfonylcarbamates is achieved within a few minutes under ultrasonic conditions by reaction with magnesium in anhydrous methanol.
A practical reagent for the synthesis of substituted hydrazines
Grehn, Leif,Nyasse, Barthelemy,Ragnarsson, Ulf
, p. 1429 - 1432 (2007/10/03)
A practical, inexpensive triprotected hydrazine reagent, 2-benzyloxycarbonyl-1 -tert-butoxycarbonyl-1- (4-methylphenylsulfonyl)-hydrazine, 1-Boc-1-Tos-2-Z-hydrazine (2), has been prepared on a 100 pnmol scale and examined with respect to application in st
Stepwise synthesis of tetrasubstituted hydrazines
Grehn, Leif,Loenn, Hans,Ragnarsson, Ulf
, p. 1381 - 1382 (2007/10/03)
A new triprotected hydrazine reagent has been made and applied in alkylation/acylation reactions for stepwise synthesis of tetrasubstituted derivatives in high purity and yield.
