Increased Activity of in Situ Catalysts for Alkyne Metathesis
摘要:
[GRAPHIC]Reaction of an enyne (1,1-diphenyl-pent-1-ene-3-yne) with a preheated mixture of Mo(CO)(6)/4-chlorophenol/3-hexyne at 130 degreesC furnished 1,1,6,6-tetraphenylhex-1,5-diene-3-yne in an 80% yield. If the starting material was heated with a mixture Of MO(CO)6 and 4-chlorophenol under identical conditions, no reaction was observed.
Increased Activity of in Situ Catalysts for Alkyne Metathesis
摘要:
[GRAPHIC]Reaction of an enyne (1,1-diphenyl-pent-1-ene-3-yne) with a preheated mixture of Mo(CO)(6)/4-chlorophenol/3-hexyne at 130 degreesC furnished 1,1,6,6-tetraphenylhex-1,5-diene-3-yne in an 80% yield. If the starting material was heated with a mixture Of MO(CO)6 and 4-chlorophenol under identical conditions, no reaction was observed.
Synthesis of Polysubstituted Enynes through Iron-Catalyzed Carbomagnesiation of Conjugated Diynes
作者:Eiichi Nakamura、Laurean Ilies、Takumi Yoshida
DOI:10.1055/s-0033-1340476
日期:——
Symmetrical and unsymmetrical conjugated diynes are chemo-, regio-, and stereoselectively carbomagnesiated with a Grignard reagent at room temperature in the presence of a catalytic amount of FeCl2 without the need for an external ligand. The resulting magnesium intermediate can be further functionalized to give polysubstituted 1,3-enyne derivatives.