Alternate, Easy and Practical Synthesis of Allylamines from Acetyl Derivatives of Baylis-Hillman Adducts Using Methanolic Ammonia
作者:Sanjay Batra、Richa Pathak、Vijay Singh、Som N. Nag、Sanjeev Kanojiya
DOI:10.1055/s-2006-926337
日期:——
A methanolic ammonia-mediated alternate, easy and practical stereoselective synthesis of allyl amines from the acetyl derivatives of Baylis-Hillman adducts is described.
Stereoselective synthesis of (E)- and (Z)-allylamines has been achieved in a single-step by treatment of the acetyl derivatives of Baylis-Hillman adducts with ammonium acetate in anhydrous methanol at room temperature. The reaction proceeded under neutral conditions to form the corresponding allylamines in high yields and stereoselectivity.
Application of Primary Allylamine Derivatives of Baylis-Hillman Adducts to Heterocyclic Synthesis: Generation of 5-Benzyl-4(3<i>H</i>)-pyrimidinones and 2-Benzylidene-2,3-dihydropyrrolizin-1-ones
作者:Sanjay Batra、Somnath Nag、Sudharshan Madapa
DOI:10.1055/s-2007-990929
日期:2008.1
The applications of the primary allyl amines afforded by the acetyl derivative of Baylis-Hillman adducts of acrylate for the synthesis of heterocycles using robust reactions are described. In the first strategy a one-pot synthesis of 5-benzyl-4(3H)- pyrimidinones have been achieved via N-formylation of the amines in the presence of neat formamide followed by ammonium formate-mediated cyclization. These