Stereoselective preparation of (E)-ε-nitro-β,γ-unsaturated methyl esters: Amberlyst A 27, using microwave, as superior catalyst for the 1,6-conjugate addition of nitroalkanes to methyl 1,3-butadiene-1-carboxylate
摘要:
1,6-Conjugate addition of nitroalkanes to methyl 1,3-b-atadiene-1-carboxylate, performed with Amberlyst A 27, using microwaves and in the absence of any solvent, allows the prevalent formation of the beta,gamma -unsaturated adduct, over the alpha,beta -unsaturated one. The products were exclusively obtained as (E)-isomers. (C) 2001 Elsevier Science Ltd. All rights reserved.
Stereoselective preparation of (E)-ε-nitro-β,γ-unsaturated methyl esters: Amberlyst A 27, using microwave, as superior catalyst for the 1,6-conjugate addition of nitroalkanes to methyl 1,3-butadiene-1-carboxylate
摘要:
1,6-Conjugate addition of nitroalkanes to methyl 1,3-b-atadiene-1-carboxylate, performed with Amberlyst A 27, using microwaves and in the absence of any solvent, allows the prevalent formation of the beta,gamma -unsaturated adduct, over the alpha,beta -unsaturated one. The products were exclusively obtained as (E)-isomers. (C) 2001 Elsevier Science Ltd. All rights reserved.