Efficient and General Synthetic Approach to Pentasubstituted Conjugated Dienes Using Site-Selective Coupling of Cuprates with 1,4-Diiodo-1,3-alkadienes as the Key Reaction C.D. would like to thank the Japan Society for the Promotion of Science (JSPS) for financial support.
Efficient and General Synthetic Approach to Pentasubstituted Conjugated Dienes Using Site-Selective Coupling of Cuprates with 1,4-Diiodo-1,3-alkadienes as the Key Reaction C.D. would like to thank the Japan Society for the Promotion of Science (JSPS) for financial support.
Site-Selective Pd-Catalyzed Coupling of 1,4-Diiodo-1,3-alkadienes with Grignard Reagents and Its Application to the Synthesis of Fulvenes
作者:Minoru Uemura、Yuuki Takayama、Fumie Sato
DOI:10.1021/ol0478032
日期:2004.12.1
[reaction: see text] The coupling reaction of 1,4-diiodo-1,3-alkadienes with a Grignardreagent in the presence of a catalytic amount of Pd(PPh3)4 proceeded with excellent site-selectivity. Synthetic application of the reaction was demonstrated by a regio- and stereoselective synthesis of 1,3,6-trisubstituted fulvenes.
Site-Selective Iodine−Magnesium Exchange Reaction of 1,4-Diiodo-1,3-Alkadienes by an Organomagnesium Ate Complex, and Its Application to Synthesis of Polysubstituted Styrenes and Phenols
作者:Kohki Fukuhara、Yuuki Takayama、Fumie Sato
DOI:10.1021/ja0353513
日期:2003.6.1
When 1,4-diiodo-1,3-alkadienes were treated with i-PrBu2MgLi, highly site-selective iodine-magnesium exchange reaction took place to afford, after the reaction with electrophiles, a variety of 1-iodo-1,3-alkadiene derivatives. Synthetic utility of the reaction was demonstrated by an efficient preparation of polysubstituted styrenes and phenols.