138206-92-5Relevant articles and documents
Silver-catalyzed asymmetric amination of silyl enol ethers
Yamashita,Ishitani,Kobayashi
, p. 666 - 672 (2000)
Catalytic amination of silyl enol ethers with azo diester compounds was investigated. It was shown that Cu(OTf)2 or AgOTf had high catalytic activity and that AgOTf was the most efficient among the catalysts tested in the reactions. In asymmetr
Synthesis of Amines and Amino Alcohols by Electrophilic Amination and Highly Stereoselective Reduction
Gmeiner, Peter,Bollinger, Bernd
, p. 273 - 278 (2007/10/02)
A practical and selective method for the synthesis of the β-arylamines 5 and the cis- or trans-amino alcohols 8 and 11 is reported.The reaction sequence starts from α-tetralones 1 which readily react with dibenzyl azodicarboxylate to afford the protected α-hydrazino ketones 2.Then, depending on the reduction conditions, the trans-hydrazino alcohols 10 or the cis isomers 7 are formed predominantly.The stereoselectivities which range between 18:1 and 1:67 (trans/cis) are explained by stereoelectronic effects (?,?* interactions) and steric hindrance.Depending on the workup procedure, we can control, whether the cis-hydrazino alcohols 7 or the oxazolidinone derivatives 3 are isolated.Subsequent hydrogenolyses of 4, 7 and 10 lead to the target molecules 5, 8 and 11, respectively. Key Words: Electrophilic amination / Dibenzyl azodicarboxylate / Stereoselective reduction