Influence of A<sup>1,3</sup>Strain on the Stereochemical Outcome of Acid-Mediated Amido Cyclization in the Synthesis of 2-(4-Methoxyphenyl)-3,4-(dihydroxy)piperidines
作者:Katakam Ramakrishna、Yerri Jagadeesh、K. V. S Ramakrishna、Joshi Laxmikanth Rao、Batchu Venkateswara Rao
DOI:10.1002/ejoc.201501577
日期:2016.3
The synthesis of 2-(4-methoxyphenyl)-3,4-(dihydroxy)piperidines was accomplished by using ethyl p-methoxycinnamate as the starting material and an acid-mediated amido cyclization reaction as the key step. This short and straightforward strategy avoids extra steps to create the chiral center and does not require a leaving group at the benzylic carbon. This study also showed that the stereochemical outcome
以对甲氧基肉桂酸乙酯为原料,以酸介导的酰氨基环化反应为关键步骤,合成了2-(4-甲氧基苯基)-3,4-(二羟基)哌啶。这种简短而直接的策略避免了创建手性中心的额外步骤,并且在苄基碳上不需要离去基团。该研究还表明,环化反应的立体化学结果受烯丙基 1,3-菌株(A1,3 菌株)的影响比受相邻组参与的影响更大。