摘要合成了一系列不同取代的2,4-二芳基-3-氮杂双环[3.3.1]壬南-9-肟,并使用H,H-COSY,NOESY明确分配了它们的1 H和13 C NMR化学位移,HSQC和HMBC光谱数据。根据NMR研究,无论取代基的性质和位置如何,所有报道的化合物均以双椅构型存在,且3-氮杂双环壬烷部分的C-2和C-4处的苯基呈赤道排列。在合成的肟衍生物中,在苯基的邻位/对位带有卤素取代基的化合物对所有测试的生物均显示出良好的抗真菌特性。 图形概要
Efficient synthesis, spectral analysis and antimicrobial studies of nitrogen and sulfur containing spiro heterocycles from 2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-ones
作者:M. Rani、R. Ramachandran、S. Kabilan
DOI:10.1016/j.bmcl.2010.09.021
日期:2010.11
cyclization of 2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-one thiosemicarbazones (2a–2h, 3a and 3b) with acetic anhydride/propionic anhydride and were characterized by Elemental analysis, IR, 1H NMR and 13C NMR spectral analysis. Single crystal X-ray diffraction has also been recorded for compounds 4c and 5a. From the NMR and Single crystal X-ray diffraction analysis, compounds 4b–4d, 4f–4h, 5b, 5c, 5f–5h, 6a
Design, synthesis and biological evaluation of novel 2-[(2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-ylidene)hydrazono]-1,3-thiazolidin-4-ones as a new class of antimicrobial agents
作者:R. Ramachandran、M. Rani、S. Kabilan
DOI:10.1016/j.bmcl.2009.03.093
日期:2009.5
New series of 2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-one thiosemicarbazones (9-16) obtained from the corresponding 2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-ones (1-8) upon cyclization with ethylbromoacetate in the presence of sodium acetate-acetic acid buffer afforded novel 2-[(2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-ylidene) hydrazono]-1,3-thiazolidin-4-ones (17-24). The synthesized compounds have been characterized by their elemental, analytical and spectral studies. Besides, the reported compounds were screened for their antibacterial and antifungal activities against a spectrum of microbial organisms. These studies proved that compounds 11/18/20/23 against Staphylococcus aureus, 19/20/24 against Salmonella typhi show maximum inhibition potency at low concentration (6.25 mu g/ml) whereas 18/19 against Candida albicans and 19/20/21 against Rhizopus sp. showed beneficial antifungal activity at minimum concentration. (C) 2009 Elsevier Ltd. All rights reserved.
Efficient Synthesis of Novel 2,4-[Diaryl-3-azabicyclo[3.3.1]nonan-9-yl]-5-spiro-4-acetyl-2-(acetylamino)-<font>Δ</font> <sup>2</sup>-1,3,4-thiadiazolines
作者:M. Rani、R. Ramachandran、S. Kabilan
DOI:10.1080/00397910903161694
日期:2010.5.11
2,4-[Diaryl-3-azabicyclo[3.3.1]nonan-9-yl]-5-spiro-4-acetyl-2-(acetylamino)-2-1,3,4-thiadiazoline derivatives (3a-h) have been synthesized by the cyclization of 2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-one thiosemicarbazones (2a-h) under acetylating condition. The synthesized compounds were characterized by analytical and spectral (infrared, 1H NMR, and 13C NMR) studies.
Synthesis, structure and conformational analysis of 2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-one thiosemicarbazones and semicarbazones
作者:R. Ramachandran、M. Rani、S. Kabilan
DOI:10.1016/j.molstruc.2010.02.005
日期:2010.4
A series of thiosemicarbazones and semicarbazones have been synthesized and characterized by one and two dimensional NMR spectroscopy. The possible ring conformations of both the hydrazones are discussed. The chemical shifts and coupling constants suggest that the reported hydrazones adopt twin-chair conformations with equatorial orientation of the aryl substituents. Besides, the proposed conformations are further confirmed by single crystal X-ray diffraction analysis and molecular optimization geometry method. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
Synthesis, complete NMR spectral assignments, and antifungal screening of new 2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-one oxime derivatives
作者:Paramasivam Parthiban、Paramasivam Rathika、Keun Soo Park、Yeon Tae Jeong
DOI:10.1007/s00706-009-0221-8
日期:2010.1
AbstractA series of differently substituted 2,4-diaryl-3-azabicyclo[3.3.1]nonan-9-one oximes have been synthesized and their 1H and 13C NMR chemical shifts have been unambiguously assigned using H,H-COSY, NOESY, HSQC, and HMBC spectral data. On the basis of the NMR studies, irrespective of the nature and position of the substituents, all reported compounds exist in twin-chair conformation with equatorial
摘要合成了一系列不同取代的2,4-二芳基-3-氮杂双环[3.3.1]壬南-9-肟,并使用H,H-COSY,NOESY明确分配了它们的1 H和13 C NMR化学位移,HSQC和HMBC光谱数据。根据NMR研究,无论取代基的性质和位置如何,所有报道的化合物均以双椅构型存在,且3-氮杂双环壬烷部分的C-2和C-4处的苯基呈赤道排列。在合成的肟衍生物中,在苯基的邻位/对位带有卤素取代基的化合物对所有测试的生物均显示出良好的抗真菌特性。 图形概要