2180-43-0Relevant articles and documents
An Intramolecular Iodine-Catalyzed C(sp3)?H Oxidation as a Versatile Tool for the Synthesis of Tetrahydrofurans
Br?se, Stefan,Koch, Vanessa
supporting information, p. 3478 - 3483 (2021/07/22)
The formation of ubiquitous occurring tetrahydrofuran patterns has been extensively investigated in the 1960s as it was one of the first examples of a non-directed remote C?H activation. These approaches suffer from the use of toxic transition metals in overstoichiometric amounts. An attractive metal-free solution for transforming carbon-hydrogen bonds into carbon-oxygen bonds lies in applying economically and ecologically favorable iodine reagents. The presented method involves an intertwined catalytic cycle of a radical chain reaction and an iodine(I/III) redox couple by selectively activating a remote C(sp3)?H bond under visible-light irradiation. The reaction proceeds under mild reaction conditions, is operationally simple and tolerates many functional groups giving fast and easy access to different substituted tetrahydrofurans.
Ruthenium-catalyzed β-alkylation of secondary alcohols with primary alcohols
Bai, Wei,Jia, Guochen
, p. 234 - 241 (2015/06/02)
The catalytic properties of a series of ruthenium complexes for β-alkylation of secondary alcohols with primary alcohols were studied. The catalytic activities of the ruthenium complexes were found to be dependent on the auxiliary ligands. The most active catalytic precursor found in this study is the ruthenium complex RuCl2(PPh3)2(2-NH2CH2Py) [2-NH2CH2Py = 2-aminomethyl pyridine], which effectively catalyzed the β-alkylation of both aryl- and alkyl-substituted secondary alcohols with benzylic and alkyl primary alcohols.
Synthesis of tipranavir analogues as non-peptidic HIV protease inhibitors
Ding, Yili,Vara Prasad, Chamakura V.N.S.,Smith, Kenneth L.,Chang, Eugene,Hong, Jian,Yao, Nanhua
scheme or table, p. 130 - 133 (2010/04/23)
An analogue of Tipranavir was designed by replacing the dihydropyrone core with a 1,3-cyclohexanedione ring. The thio-alky1 group was used as a temporary protection group for α, β-unsaturated cyclohexane-1,3-diketone derivative, and the resulting compound was reacted with an ethyl-organometallic reagent to form the desired Michael addition product. By using this strategy, a more stable analogue of Tipranavir was synthesized and exhibited excellent HIV protease inhibition (12 nM Ki).
