Combination of <i>tert</i>-Butoxycarbonyl and Triphenylphosphonium Protecting Groups in the Synthesis of Substituted Hydrazines
作者:Olga Tsubrik、Uno Mäeorg
DOI:10.1021/ol0160856
日期:2001.7.1
[GRAPHICS]A new reagent for the systematic synthesis of substituted hydrazines is reported. Unlike previously developed reagents, this one contains only two protecting groups, thus providing a faster approach to multisubstituted derivatives. The selective introduction of alkyl and acyl groups is illustrated by a few examples, Also a new fast method for the deprotection of the triphenylphosphonium group is presented.
Very efficient one-pot conversion of N-aminophthalimide derivatives into the corresponding N-amino-di-tert-butyl imidodicarbonates
作者:Nicolas Brosse、Brigitte Jamart-Grégoire
DOI:10.1016/s0040-4039(01)02128-1
日期:2002.1
The phthaloyl group can be efficiently converted in very mild conditions into bis-tert-butyloxycarbonyl group using MeNH2, then Boc(2)O/DMAP, in a one-flask protocol. (C) 2002 Elsevier Science Ltd. All rights reserved.
[EN] The invention is related to compounds of formula (I) as antagonists of the TGFß family type I receptors, Alk5 and/or AIk 4, compositions and methods of use. The compounds of formula (I) can be employed in the prevention and/or treatment of diseases such as fibrosis (e.g., renal fibrosis, pulmonary fibrosis, and hepatic fibrosis), progressive cancers, or other diseases for which reduction of TGFß family signaling activity is desirable. [FR] L'invention concerne des composés de formule (I) utilisés comme antagonistes des récepteurs de type I de la famille du TGFß, Alk5 et/ou AIk 4, des compositions et des procédés d'utilisation. Les composés de formule (I) peuvent être utilisés dans la prévention et/ou le traitement de maladies telles que la fibrose (p. ex. la fibrose rénale, la fibrose pulmonaire et la fibrose hépatique), cancers évolutifs ou autres maladies pour lesquelles la diminution de l'activité de signalisation de la famille du TGFß est désirable.