电子转移引发的手性辅助取代的N-酰基-α-脱氢(1-萘基)丙氨酰胺向相应的3,4-二氢苯并[ f ]喹啉酮衍生物的不对称光环化
摘要:
在含有叔胺的甲醇中,标题为N-酰基-α-脱氢萘丙氨酰胺[(Z)-1 ]与(S)-1-苯基乙氨基和(S)-丙氨酰胺辅助基的光诱导电子转移反应显示形成(R,在室温下分别过量的S)-和(S,S)-3,4-二氢苯并[ f ]喹啉酮衍生物(2)。(R,S)-2的非对映体过量(de)的幅度在-5–26%的范围内,而(S,S)-的非对映体过量(de)的范围在16–92%的范围内2,取决于手性助剂和反应温度。基于溶剂,叔胺,手性助剂和温度对de值的影响以及非对映体烯醇中间体的MM2和PM5计算,讨论了最终提供非对映体2的光环化过程中的不对称诱导机理。
An Efficient and Epimerization Free Synthesis of C-Terminal Arylamides Derived from α-Amino Acids and Peptide Acids via T3P Activation
作者:Chilakapati Madhu、Panguluri NageswaraRao、N. Narendra、Vommina V. Sureshbabu
DOI:10.1007/s10989-013-9383-7
日期:2014.9
A high yield and rapid synthesis of enantiomerically pure N α-protected amino/peptideacid arylamides using n-propylphosphonic anhydride (T3P) in presence of N-methylmorpholine is described. The generality of the reaction has been studied for various N α-protected amino acids with diverse range of aromatic amines and coumarin derivatives.
An Efficient Greener Approach for N-acylation of Amines in Water Using Benzotriazole Chemistry
作者:Tarek S. Ibrahim、Israa A. Seliem、Siva S. Panda、Amany M. M. Al-Mahmoudy、Zakaria K. M. Abdel-Samii、Nabil A. Alhakamy、Hani Z. Asfour、Mohamed Elagawany
DOI:10.3390/molecules25112501
日期:——
straightforward, mild and cost-efficient synthesis of various arylamides in water was accomplished using versatile benzotriazole chemistry. Acylation of various amines was achieved in water at room temperature as well as undermicrowaveirradiation. The developed protocol unfolds the synthesis of amino acid aryl amides, drug conjugates and benzimidazoles. The environmentally friendly synthesis, short reaction