Reactions of Substituted (1,3-Butadiene-1,4-diyl)magnesium, 1,4-Bis(bromomagnesio)butadienes and 1,4-Dilithiobutadienes with Ketones, Aldehydes and PhNO To Yield Cyclopentadiene Derivatives and N-Ph Pyrroles by Cyclodialkenylation
作者:Hongyun Fang、Guotao Li、Guoliang Mao、Zhenfeng Xi
DOI:10.1002/chem.200400025
日期:2004.7.19
4-Dilithiobutadiene derivatives 1, 1,4-bis(bromomagnesio)butadiene derivatives 2 and metallacyclic (1,3-butadiene-1,4-diyl)magnesium reagents 3 were prepared and their reactions with ketones, aldehydes, and PhNO were investigated. Multiply substituted cyclopentadienes and N-Ph pyrroles were formed by unprecedented reaction conditions. The carbonyl group of aldehydes and ketones was deoxygenated during
制备了1,4-二硫代丁二烯衍生物1,1,4-双(溴镁)丁二烯衍生物2和金属环(1,3-丁二烯-1,4-二基)镁试剂3,并与酮,醛和PhNO进行了反应调查。多重取代的环戊二烯和N-Ph吡咯是通过空前的反应条件形成的。醛和酮的羰基在反应过程中被脱氧,并在形式上表现为一碳单元;裂解PhNO的N == O部分,得到N-Ph吡咯衍生物。此外,揭示了这三种类型的试剂1、2和3之间的不同反应性。1,4-二锂试剂1容易与醛和酮反应;1,4-二镁试剂2与醛反应,但不与酮反应;