Influence of the side-group at C=N bridging bond of bis-aryl Schiff bases on the wavelength of absorption maximum of ultraviolet absorption spectra
作者:Qingqing Luo、Chao-Tun Cao、Zhongzhong Cao、Chenzhong Cao
DOI:10.1002/poc.3550
日期:2016.8
methyl CH3 at carbon end and the CH=N(O) has a side‐group O atom at nitrogen end. In this work, a series of XPEAY and XPNY were synthesized, and their longest wavelength maximum λmax (nm) of ultravioletabsorptionspectra were measured. Then the change regularity of the νmax (cm‐1, νmax=1/λmax) of XPEAY and XPNY were investigated, and they were compared with that of XBAY (reported by ref.26). The results
Enantioselective Oxidative Multi-Functionalization of Terminal Alkynes with Nitrones and Alcohols for Expeditious Assembly of Chiral α-Alkoxy-β-amino-ketones
functionalization of alkynes has emerged as an effective method in synthetic chemistry in recent decades. However, enantioselective transformations via metal carbene intermediates are quite rare due to the lack of robust chiralcatalysts, especially in the intermolecular versions. Herein, we report the first asymmetric three-component reaction of commercially available alkynes with nitrones and alcohols, which affords
Synthesis of Benzimidazolones via One-Pot Reaction of Hydroxylamines, Aldehydes, and Trimethylsilyl Cyanide Promoted by Diacetoxyiodobenzene
作者:Huaiyuan Zhang、Danfeng Huang、Ke-Hu Wang、Jun Li、Yingpeng Su、Yulai Hu
DOI:10.1021/acs.joc.6b02781
日期:2017.2.3
A novel and efficient PhI(OAc)2-promoted one-pot reaction of aromatic hydroxylamines, aldehydes, and TMSCN in the presence of BF3·Et2O is described. A wide variety of N-substituted benzimidazolones are obtained with satisfactory yields under mild reaction conditions. The method was proven to be efficient for the synthesis of benzimidazolone derivatives from readily available starting materials.
STUDIES ON CYCLOADDITION REACTIONS OF VINYLPHOSPHONATES WITH NITRONES
作者:Yong Ye、Ling-Yun Li、Li Tian、Lun-Zu Liu
DOI:10.1080/10426500490485507
日期:2004.12.1
Cycloaddition reactions of vinylphosphonates with nitrones were studied. A series of 4-phosphonyl-3-aryl-N-arylisoxazolidines were synthesized by the reaction of vinylphosphonates with nitrones. The structure of 3a was confirmed by X-ray single-crystal diffraction.
Manrao; Matharu, Balbir Kaur; Gill, Journal of the Indian Chemical Society, 2009, vol. 86, # 5, p. 531 - 534