2,2-Dichloroalkanecarboxylic acids, processes for their production and
申请人:Roche Diagnostics GmbH
公开号:US05968982A1
公开(公告)日:1999-10-19
Pharmaceutical agents for treating diabetus mellitus which contain a compound of formula I ##STR1## as the active substance, in which A, B, A' and W have the meanings stated in the claims, new compounds of formula I as well as processes for their production.
A short approach to chaetomellic anhydride A from 2,2-dichloropalmitic acid: elucidation of the mechanism governing the functional rearrangement of the chlorinated pyrrolidin-2-one intermediate
作者:Franco Bellesia、Chiara Danieli、Laurent De Buyck、Roberta Galeazzi、Franco Ghelfi、Adele Mucci、Mario Orena、Ugo M. Pagnoni、Andrew F. Parsons、Fabrizio Roncaglia
DOI:10.1016/j.tet.2005.09.140
日期:2006.1
Chaetomellic anhydride A was efficiently attained in three steps, starting from 2,2-dichloropalmitic acid and 2-(3-chloro-2-propenylamino)pyridine. Atom transfer radical cyclisation selectively formed the cis-stereoisomer of the trichloropyrrolidin-2-one, which underwent a stereospecific functional rearrangement to form a substituted maleimide. The choice of 2-pyridyl, as ‘cyclisation auxiliary’ in
Buyck, L. De; Casaert, F.; Lepeleire, C. De, Bulletin des Societes Chimiques Belges, 1988, vol. 97, # 7, p. 525 - 534
作者:Buyck, L. De、Casaert, F.、Lepeleire, C. De、Schamp, N.
DOI:——
日期:——
Oxidation of Aliphatic 2,2‐Dichloroalkanals by HNO<sub>3</sub> in CH<sub>2</sub>Cl<sub>2</sub>: An Easy and Eco‐friendly Route to the Corresponding 2,2‐Dichloroalkanoic Acids
作者:Franco Bellesia、Laurent De Buyck、Franco Ghelfi、Ugo M. Pagnoni、Paolo Strazzolini
DOI:10.1081/scc-120030698
日期:2004.12.31
A simple, economically convenient, and eco-compatible procedure for the oxidation of 2,2-dichloroalkanals to the corresponding alkanoic acids has been set up, employing HNO3 in CH2Cl2, in the presence of NaNO2 as catalyst.
2,2-DICHLORALKANCARBONSÄUREN, VERFAHREN ZU IHRER HERSTELLUNG DIESE ENTHALTENDE ARZNEIMITTEL, UND IHRE VERWENDUNG ZUR BEHANDLUNG DER INSULINRESISTENZ