Homoallylic amines by reductive inter- and intramolecular coupling of allenes and nitriles
作者:Peter Wipf、Marija D Manojlovic
DOI:10.3762/bjoc.7.94
日期:——
The one-pot hydrozirconation of allenes and nitriles followed by an in situ transmetalation of the allylzirconocene with dimethylzinc or zinc chloride provides functionalized homoallylic amines. An intramolecular version of this process leads to 3-aminotetrahydrofurans and 3-aminotetrahydropyrans.
Regioselective Allene Synthesis and Propargylations with Propargyl Diethanolamine Boronates
作者:Daniel R. Fandrick、Jonathan T. Reeves、Zhulin Tan、Heewon Lee、Jinhua J. Song、Nathan K. Yee、Chris H. Senanayake
DOI:10.1021/ol9022529
日期:2009.12.3
The utility of propargyl diethanolamine boronates as reagents for the preparation of allenes and homopropargylic alcohols is presented. Protonolysis with TFA and electrophilic substitution with N-halosuccinimides proceeded with inversion to provide the corresponding allene in high yield and regioselectivity. Alternatively, the propargylation of aldehydes was achieved with use of the in situ generated lithiated complex.
Synthesis of Homoallylic Amines by Hydrozirconation−Imine Addition of Allenes
作者:Peter Wipf、Joshua G. Pierce
DOI:10.1021/ol051266j
日期:2005.8.1
Hydrozirconation of allenes followed by in situ transmetalation to dialkylzinc leads to the formation of an allylic zinc species that, upon addition of aldimines to the reaction mixture, provides homoallylic amines in 64-85% yield.
New and Stereospecific Synthesis of Allenes in a Single Step from Propargylic Alcohols