Scope and limitation of intramolecular Pauson–Khand reaction of fluorine-containing enynes
摘要:
Intramolecular Pauson-Khand reaction of various fluorine-containing enynes was investigated under various conditions. The reaction of the substrates. which have fluorine atom(s) or fluorine-containing group(s) attached to alkenyl moiety, gave the corresponding cyclopentenones in low to moderate yield, while that of the substrates bearing fluorine-containing groups attached to alkynyl moiety afforded the corresponding cyclopentenones in low to high yield. (C) 2001 Elsevier Science B.V. All rights reserved.
Scope and limitation of intramolecular Pauson–Khand reaction of fluorine-containing enynes
摘要:
Intramolecular Pauson-Khand reaction of various fluorine-containing enynes was investigated under various conditions. The reaction of the substrates. which have fluorine atom(s) or fluorine-containing group(s) attached to alkenyl moiety, gave the corresponding cyclopentenones in low to moderate yield, while that of the substrates bearing fluorine-containing groups attached to alkynyl moiety afforded the corresponding cyclopentenones in low to high yield. (C) 2001 Elsevier Science B.V. All rights reserved.
Nickel-Catalyzed Hydrosilylation/Cyclization of Difluoro-Substituted 1,6-Enynes
作者:Manabu Takachi、Naoto Chatani
DOI:10.1021/ol102019w
日期:2010.11.19
Ni-catalyzed hydrosilylative cyclization of difluoro-substituted 1,6-enynes can be carried out. The presence of a geminal-difluoromethylene group at an alkene terminus in enynes is essential for the reaction to proceed.