A Novel and Efficient Methodology for the C−C Bond Forming Radical Cyclization of Hydrophobic Substrates in Water
作者:Yasuyuki Kita、Hisanori Nambu、Namakkal G. Ramesh、Gopinathan Anilkumar、Masato Matsugi
DOI:10.1021/ol010014p
日期:2001.4.1
The combination of water-soluble radical initiator 2,2' azobis[2-(2-imidazolin-2-yl)propane] (VA-061), water soluble chain carrier 1-ethylpiperidine hypophosphite (EPHP), and surfactant cetyltrimethylammonium bromide (CTAB) was found to be the most suitable condition for effective radical cyclization in water for a variety of hydrophobic substrates.
A Novel Titanium-Catalyzed Cyclization of Olefinic Iodoethers to Tetrahydrofurans
作者:Longhu Zhou、Toshikazu Hirao
DOI:10.1021/jo026290e
日期:2003.2.1
A catalytic reductive cyclization of olefinic iodo-ethers was achieved by use of cat. Cp2TiCl2 in the presence of Mn and Me3SiCl. This protocol provides a versatile method for the selective formation of multisubstituted tetrahydrofurans.