Zobrazeno 1 - 10
of 226
pro vyhledávání: '"Achille Umani-Ronchi"'
Publikováno v:
Advanced Synthesis & Catalysis. 351:2521-2524
“Deficient” but “efficient”, the first example of catalytic Friedel-Crafts alkylation of arenes, carrying electron-withdrawing groups, with alcohols is reported. The optmized iron(III) chloride (97%) FeCl3 catalyzed allylation, benzylation an
Publikováno v:
Angewandte Chemie. 120:3282-3285
Publikováno v:
Advanced Synthesis & Catalysis. 350:531-536
The Friedel-Crafts-type intramolecular allylic alkylation of simple arenes is performed in the presence of a catalytic amount of [Mo(II) (CO) 4 Br 2 ] 2 (2.5 mol%). The moisture-tolerant protocol provided a mild and direct access to a large library o
Publikováno v:
Mini-Reviews in Organic Chemistry. 4:115-124
Autor:
Magda Monari, Marco Bandini, Fabio Piccinelli, Simona Tommasi, Achille Umani-Ronchi, Vincenzo G. Albano
Publikováno v:
Inorganica Chimica Acta. 360:1000-1008
A combined catalytic and crystallographic investigation on the effectiveness of chiral diamino-bithiophene (2) and the corresponding diimino molecules (1) as chiral ligands for Pd(II) catalyzed transformations is presented. In particular, a systemati
Autor:
Gian Pietro Miscione, Marco Bandini, Rossana Pierciaccante, Achille Umani-Ronchi, Pier Giorgio Cozzi, Andrea Bottoni, Magda Monari
Publikováno v:
European Journal of Organic Chemistry. 2006:4596-4608
C2-Symmetrical boron complexes, prepared by the reactions of 2,2′-methylenebis(oxazolines) (BOXs) with catecholborane (CATBH), can be used as catalysts (5–10 mol-%) in the enantioselective reduction of prochiral ketones (ee 72–86 %), giving the
Publikováno v:
European Journal of Organic Chemistry. 2006:3527-3544
Over the past years an astonishing number of highly chemo- and regioselective intramolecular Friedel–Crafts (IMFC)-type alkylations of aromatic compounds have been described in the literature that allow remarkable synthetic shortcuts for the prepar
Autor:
Simona Tommasi, Marco Angeli, Marco Bandini, Fabio Piccinelli, Achille Umani‐Ronchi, Andrea Garelli
Publikováno v:
Org. Biomol. Chem.. 4:3291-3296
A practical catalytic approach to the synthesis of 4-substituted 1,2,3,4-tetrahydro-beta-carbolines (THBCs, 1) and 1,2,3,9-tetrahydropyrano[3,4-b]indoles (2) via InBr3-catalyzed intramolecular Friedel-Crafts (F-C) cyclization is described. The use of
Autor:
Achille Umani-Ronchi, Magda Monari, Manuela Melucci, Vincenzo G. Albano, Simona Tommasi, Marco Bandini, Fabio Piccinelli
Publikováno v:
Advanced synthesis & catalysis
347 (2005): 1507–1512. doi:10.1002/adsc.200505109
info:cnr-pdr/source/autori:Bandini, Marco (2); Melucci, Manuela (1); Umani-Ronchi, Achille (2); Piccinelli, Fabio (2); Tommasi, Simona (2); Monari, Magda (2); Albano, Vincenzo Giulio (2)/titolo:Novel chiral diamino-oligothiophenes as valuable ligands in Pd-catalyzed allylic alkylations. On the "primary" role of "secondary" interactions in asymmetric catalysis/doi:10.1002%2Fadsc.200505109/rivista:Advanced synthesis & catalysis (Print)/anno:2005/pagina_da:1507/pagina_a:1512/intervallo_pagine:1507–1512/volume:347
347 (2005): 1507–1512. doi:10.1002/adsc.200505109
info:cnr-pdr/source/autori:Bandini, Marco (2); Melucci, Manuela (1); Umani-Ronchi, Achille (2); Piccinelli, Fabio (2); Tommasi, Simona (2); Monari, Magda (2); Albano, Vincenzo Giulio (2)/titolo:Novel chiral diamino-oligothiophenes as valuable ligands in Pd-catalyzed allylic alkylations. On the "primary" role of "secondary" interactions in asymmetric catalysis/doi:10.1002%2Fadsc.200505109/rivista:Advanced synthesis & catalysis (Print)/anno:2005/pagina_da:1507/pagina_a:1512/intervallo_pagine:1507–1512/volume:347
A new class of chiral C 2 -symmetrical diamino-oligothiophenes is described to be effective in catalyzing Pd-mediated asymmetric allylic alkylations in a highly enantioselective manner. The combination of experimental as well as crystallographic evid
Publikováno v:
Organic Letters. 6:3199-3202
[reaction: see text] A systematic study addressed toward the optimization of the Pd-catalyzed alkylation of indoles by allylic carbonates is presented. The protocol uses a catalytic amount of [PdCl(pi-allyl)](2)/phosphine as a promoting agent, provid