Total Synthesis of (±)-Decursivine and (±)-Serotobenine: A Witkop Photocyclization/Elimination/O-Michael Addition Cascade Approach
作者:Hua Qin、Zhengren Xu、Yuxin Cui、Yanxing Jia
DOI:10.1002/anie.201100495
日期:2011.5.2
A photo op: The concise total syntheses of (±)‐decursivine and (±)‐serotobenine were achieved by using the titled cascade reaction, which is modeled on the biomimetic pathway. The synthesis of (±)‐decursivine, which exhibits antimalarial activity, was carried out in five steps without using protecting groups.
Polyhalobenzylic disulfooxonium compounds are produced by the reaction of aromatic methyl, halomethyl or hydroxymethyl substituents with sulfur trioxide. The disulfooxonium salts are readily converted to alcohols by hydrolysis to provide monomers for the production of fire resistant polymers and additives for polymers. Likewise, the disulfooxonium compounds of this invention present chemical intermediates for a wide range of useful products such as halogenated pesticides.
Buyck, L. De; Verhe, R.; Kimpe, N. De, Bulletin des Societes Chimiques Belges, 1980, vol. 89, # 6, p. 441 - 458
作者:Buyck, L. De、Verhe, R.、Kimpe, N. De、Courtheyn, D.、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.
Halogen atom transfer radical cyclization of N-allyl-N-benzyl-2,2-dihaloamides to 2-pyrrolidinones, promoted by Fe0-FeCl3 or CuCl-TMEDA
作者:Miriam Benedetti、Luca Forti、Franco Ghelfi、Ugo Maria Pagnoni、Roberto Ronzoni
DOI:10.1016/s0040-4020(97)00908-3
日期:1997.10
The halogen atom transfer radical cyclization of a N-allyl-N-benzyl-2,2-dihaloamides to 2-pyrrolidinones has been carried out in high yields under mild conditions, in a reaction promoted by CuCl-TMEDA or Fe-0-FeCl3 in acetonitrile or N,N-dimethylformamide, respectively. (C) 1997 Elsevier Science Ltd.