10056-69-6Relevant articles and documents
Photoredox-Catalyzed Site-Selective α-C(sp3)?H Alkylation of Primary Amine Derivatives
Ashley, Melissa A.,Yamauchi, Chiaki,Chu, John C. K.,Otsuka, Shinya,Yorimitsu, Hideki,Rovis, Tomislav
, p. 4002 - 4006 (2019)
The synthetic utility of tertiary amines to oxidatively generate α-amino radicals is well established, however, primary amines remain challenging because of competitive side reactions. This report describes the site-selective α-functionalization of primary amine derivatives through the generation of α-amino radical intermediates. Employing visible-light photoredox catalysis, primary sulfonamides are coupled with electron-deficient alkenes to efficiently and mildly construct C?C bonds. Interestingly, a divergence between intermolecular hydrogen-atom transfer (HAT) catalysis and intramolecular [1,5] HAT was observed through precise manipulation of the protecting group. This dichotomy was leveraged to achieve excellent α/δ site-selectivity.
Convenient one-pot synthesis of N-substituted 3-trifluoroacetyl pyrroles
Zanatta, Nilo,Wouters, Ana D.,Fantinel, Leonardo,Da Silva, Fabio M.,Barichello, Rosemário,Da Silva, Pedro E. A.,Ramos, Daniela F.,Bonacorso, Helio G.,Martins, Marcos A. P.
experimental part, p. 755 - 758 (2009/07/18)
A new one-pot strategy for the synthesis of a series of new N-substituted 3-trifluoroacetyl pyrroles is presented. These compounds were obtained by the reaction of 3-trifluoroacetyl-4,5-dihydrofuran with primary amines, which generated 1,1,1-trifluoro-3-(2-hydroxyethyl)-4-alkylaminobut-3-en-2-one intermediates. In most cases these intermediates were not stable enough to be isolated. Thus, in the same reaction vessel they were directly submitted to oxidation with PCC (Corey's reagent) to furnish 1,1,1-trifluoro-3-(2-ethanal)-4- alkylaminobut-3-en-2-ones, which under reflux underwent intramolecular cyclization to give the desired N-substituted 3-trifluoroacetyl pyrroles, in moderate yields. All of these pyrroles were tested against pan-susceptible Mycobacterium tuberculosis H37Rv and clinical isolates INH- and RMP-resistant strain and some of these compounds showed significant in vitro antimicrobial activity. Georg Thieme Verlag Stuttgart.
Acetamide derivatives and the use thereof as inhibitors of coagulation factors xa and viia
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, (2008/06/13)
Novel compounds of the formula I, in which R, R1 and R2 are as defined in patent claim 1, are inhibitors of coagulation factor Xa and VIIa and can be employed for the treatment of thromboses, myocardial infarction, arteriosclerosis, inflammation, apoplexis, angina pectoris, restenosis after angioplasty, claudicatio intermittens, tumours, tumour diseases and/or tumour metastases.
