Simple aromatic amines from justicia gendarussa. 13C NMR spectra of the bases and their analogues
作者:Ajit Kumar Chakravarty、Partha Pratim Ghosh Dastidar、Satyesh Chandra Pakrashi
DOI:10.1016/0040-4020(82)80253-6
日期:1982.1
ethers 1 and 2 from 1H NMR and mass spectral analyses of the bases and their acetates. Structures 3 and 4 have also been confirmed by synthesis. Intramolecular hydrogen bonding (cf. 9, 13 and 14) has been envisaged to explain the unexpected shielding of -CH2-OH carbon signals of 34 on acetylation and upfield displacement of -CH2-N signal of 2a vs 4a in their 13C NMR spectra in CDCl3 solution 1JCH values
从Justicia gendarussa Burm的叶子中分离出四种简单的0-二取代芳香胺,其特征为2-氨基苄醇(3),2-(2'-氨基-苄氨基)苄醇(4)及其各自的0-甲基醚1和2从1 H NMR和所述碱及其乙酸酯的质谱分析鉴定。结构3和4也已经通过合成确认。分子内氢键(参见9,13和14)已被设想来解释-CH的出乎意料的屏蔽2的-OH碳信号34上的乙酰化和-CH的高场位移2的-N信号2a中VS 4A在其13在CDCl C NMR光谱3溶液1个Ĵ CH数值已经发现对于芳香族次甲基碳信号的在邻-二取代的化合物的有用的分配。印度药用植物研究系列的第68部分。对于第67部分,请参见PK Dutta,D。Bagchi和SC Pakrashi,Indian J. Chem。在新闻。