Zhi-Tang Huang
Chinese Academy of Sciences
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Featured researches published by Zhi-Tang Huang.
Heterocycles | 1994
Zhi-Tang Huang; Zhi-Tang Hunag; Mei-Xiang Wan
Heterocyclic ketene aminals are presented in view of their synthesis, reactions and applications in the preparation of fused heterocycles
Tetrahedron | 1997
Qi-Yu Zheng; Chuan-Feng Chen; Zhi-Tang Huang
Abstract A new type of calix[4]crown containing ester group 3 has been synthesized and selectively nitrated to give 4 or ipso-nitrated to give 6. By nitration a novel calixcrown 5 containing a quinone segment was obtained. These nitrated calixcrowns have been used as chromogenic hosts for complexing alkylamines and the factors affecting recognition are discussed.
Tetrahedron Letters | 1987
Zhi-Tang Huang; Xiao-jun Wang
Abstract 2-(Hexahydro-2-pyrimidinylidene)cycloalkanones 1 react with ethyl propiolate in alcoholic solution to give 9-(alkoxycarbonylalkyl)-pyrido[1,2-a]pyrimidines 3 via ring cleavage of cyclic ketones.
Tetrahedron-asymmetry | 1999
Hu-Shan Yuan; Zhi-Tang Huang
Abstract The synthesis of chiral calix[4]arenes with tartaric acid ester moieties has been achieved by the reactions of tartaric ester chloroacetates with calix[4]arenes in moderate yields. All the chiral calix[4]arene derivatives are in a cone conformation according to the 1 H NMR doublet–doublet pattern of the protons of the methylene groups between the phenol rings. The results of NMR and specific rotations indicate that the molecules have C 2 symmetry with asymmetric features.
Carbohydrate Research | 1999
Xiao-Min Chen; Zhan-Jiang Li; Zhong-Xu Ren; Zhi-Tang Huang
A series of potential bioactive compounds, 1-glucosyl-4-heterocyclyl-5-(p-substituted-phenyl)-1,2,3-triazoles , were synthesized. Highly stereoselective products were obtained in good yield. Primary activity screening showed that this type of N-glucosylic compound possessed antitumour and antiviral activities.
Synthetic Communications | 1997
Wen-Chun Zhang; Yan-Song Zheng; Zhi-Tang Huang
Abstract Calixarenes 1 were directly nitrated with potassium nitrate and aluminum chloride to give p-nitrocalixarenes 2 in good yields. Formation of p-nitrocalix[4]arene (2a) from reaction of p-bromomethylcalix[4]arene (3) with silver nitrate is also described.
Tetrahedron Letters | 2001
Cheng-Chu Zeng; Ya-Ling Tang; Qi-Yu Zheng; Li-Jun Huang; Bin Xin; Zhi-Tang Huang
Abstract Calix[4]arene derivatives with one adenine or thymine sidearm have been synthesized and their self-association characteristics which depend on solvent, temperature and concentrations are described. Mainly Watson–Crick A-T base pairing in these systems was detected using 1 H NMR and ESI-MS.
Synthetic Communications | 1999
Wen-Guang Wang; Qiyu Zheng; Zhi-Tang Huang
Abstract Calix[4]arenes 1 or 2 react with alkyl halides and aqueous potassium hydroxide in the presence of PEG as phase transfer catalyst at room temperature to give the selectively distally dietherified product 3 or 4 in excellent yields. While at the same reaction conditions, calix[8]arene 5 give the fully etherified product 6.
Synthetic Communications | 1995
Mei-Xang Wang; Xiao-Dong Wu; Li-Ben Wang; Zhi-Tang Huang
Abstract In the presence of sodium hydride, benzoyl-substituted heterocyclic ketene aminals 1 reacted with benzyl chloride 2 to give exclusively the N-benzylated products 3 in moderate yields.
Synthetic Communications | 1995
Ying Cheng; Min Zhao; Mei-Xiang Wang; Li-Ben Wang; Zhi-Tang Huang
Abstract Acetyl-substituted heterocyclic enamines 4 were synthesized from lactim ethers 2 and acetylacetone through condensation and deacetylation reactions, and they, along with the ester-substituted heterocyclic enamines 6, reacted with diethyl azodicarboxylate to afford C-adducts 7 and 8 in excellent yields.