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Phosphoryl Amino Acids and Peptides

Tricyclic Triazaphosphole

Isolated from Ginger

Isolated from Valeriana officinalis

Synthesis of Peptides

Garlic's Key Antibacterial Componensts

Enzyme-Catalyzed Reduction Reactions

Yeast-Catalyzed Reduction Reactions

Drug Discovery Resarch

Drug Discovery Resarch

Synthesis of Steroids

Synthesis of Cpd 7 (Intermediate for Misoproatol

Synthesis of Dienecarbamates as Adapt Prodrug Models

Synthesis of Mn Complex

Synthesis of Tetraphosphocubane

Synthesis of Hypericine

Synthesis of Misoprostol (Anti-Ulcer Drug)

1985 - 2004

• "The Synthesis of Dienecarbamates as ADAPT Prodrug Models", G. X. Ma, R. A. Batey, S. D. Taylor, G. Hum and J. B. Jones, Synthetic Communications, 1997, 27(14), 2445-2453.
  
  
• "Oxidative Addition Reactions onto Tetraphosphacubane with Bis(trimethylsilyl)peroxide, Sulfur and Selenium", X. Ma, M. Birkel, T. Wettling & M. Regitz, Heteroatom Chemistry, 1995, 6(1), 1-7.
  
  
• "Organophosphorus Compounds; 99. An Efficient One-pot Synthesis of 1,1-Bis(h5-cyclopentadienyl)-1-zircono-3-phosphaindenes", X. Ma & M. Regitz, Synthesis, 1995, 6, 667-670.
  
  
• "Structure of Bis(1,1-dimethylethyl)sulfonyl Disulfide", F. Freeman, X. Ma & R. I. Lin, Acta Crystallographica (The Journal of Applied Crystallography), 1995, C51, 661-663.
  
  
• "Garlic Chemistry. Peroxidation of Bis(2-Propenyl)disulfide, Bis(2-Propenyl)trisulfide, and their Monoxide Derivatives", F. Freeman, X. Ma & R. I. Lin, Sulfur Lett., 1993, 15(6), 253-262.
  
  
• "A Convenient Synthesis of N-Phosphoryldipeptide Acids by Direct Phosphorylation", X. Ma & Y. Zhao, Synthesis, 1992, 759-760.
  
  
• "Phosphoryl Group Participation in the Reactions of N-Phosphoryldipeptide Acids", X. Ma & Y. Zhao, Phosphorus, Sulfur and Silicon, 1992, 66 (1-4), 107-114.
  
  
• “The self-activation of N-Phosphoramino acids and N-phosphodipeptides”, Y. Li, X. Ma & Y. Zhao, Shengwu Huaxue Zazhi, 1992, 8(4), 434-437.
  
  
• "Synthesis of N-Phosphoryl Di(or Tri) peptides Through the Active Ester Method", X. Ma & Y. Zhao, ibid., 1991, 61, 9-18.
  
  
• "Fragmentation Characteristics of N-(O,O-Dialkylphosphoryl)peptides under the Fast Atom Bombardment", X. Ma & Y. Zhao, Biomed. Environ. Mass Spectrom., 1991, 20 (8), 498-502.
  
  
• "New Acyclic and Fused Tricyclic Phosphorus Compounds Afforded by Novel Condensation", J. Zhang & X. Ma, Phosphorus, Sulfur and Silicon, 1990, 53, 291-298.
  
  
• "Reaction of (2-Benzothiazolyl)sulfenamides with P-containing Reagents", J. Zhang & X. Ma, ibid., 1990, 53, 15-20.
  
  
• "New Derivatives of 4,5-Benzo-1,3,2-oxaza(or diaza)-phospholane from Convenient Condensation of Substituted Urea with Tris(dialkylamino)phosphine", X. Ma & J. Zhang, ibid., 1990, 53, 227-231.
  
  
• "A New Synthesis and Spectral Studies of 1,3,2-Diazaphosphetidin-4-one Derivatives", X. Ma & J. Zhang. ibid., 1990, 53, 233-237.
  
  
• "The Chemistry of Fused Cyclotriazaphosphole -- Synthesis, Reactions, Mechanism and Conformation", J. Zhang, W. Xu, & X. Ma, H. Lu & J. Lu, Phosphorus, Sulfur and Silicon., 1990, 49/50. 105-108.
  
  
• "Synthesis and Novel Properties of N-Phosphorylpeptides", X. Ma & Y. Zhao, J. Org. Chem., 1989, 54 (16), 4005-4008.

 

• Freeman, Fillmore; Huang, Bao-Cuo: Lee, Choonsun: Lin, Robert I.; Ma, Xiaobo, Greaves, John, “LIQUID SIMS, GC-MS AND DIRECf PROBE•MS OF OXIDIZED ALKYL TRISULFIDES”, University of California, Irvine, Irvine, CA 92717. The 42nd ASMS Conference on Mass Spectrometry, May 29 - June 3, 1994, Hyatt Regency Hotel, Chicago, Illinois.
  
  
• J. T. Pinto, R. K. Tiwari, C. H. Qiao, M. Osborne, R. I. S. Lin, F. Freeman & X. Ma, "Effects of Aged Garlic Extract and Its Constituents on Growth and Glutathione Metabolism in Human Breast Cancer Cells", 4th Int. Conf. on Prevention of Human Cancer: Nutrition & Chemoprevention Controversies, Arizona Cancer Center, Tucson, June 3-6, 1992.
  
  
• F. Freeman, R. I.-S Lin, X. Ma & C. Lee, "Peroxidation of Allicin and Sterically Crowed Sulfinothioic Acid S-Esters (Thiosulfinates)", 201st National Conference of the American Chemical Society, Sanfrancisco, 1992.
  
  
• Y. Zhao, G. Ji, D. Zhang, X. Ma & Y. Yin, "The Self-Catalysis of the N-Phosphoryl Amino Acids and Peptides", Chinese Peptide Symposium, Shanghai, P. R. China. August, 1990. Poster, LF-09, p 47.
  
  
• Y. Chen, Y. Li, Y. Zhao, Y. C. Li, X. Ma, D. Zhang, G. Ji & S. Xi, "Novel Chemical Properties of the N-Phosphoryl Amino Acids and Peptides". The 1st Sino-Soviet Bilateral Sympposium on Organophosphorus Chemistry, Shanghai, P. R. China. October, 1990. Poster, A-9, p 46.
  
  
• X. Ma, D. Zhang, G. Ji & Y. Zhao, "Self-Catalysis, Activation and Growth of the N-Phosphoryl Amino Acids and Peptides", The 2nd Int. Conf. on Heteroatom Chemistry, New York. July, 1989, Lecture, OB-6, p 51.
  
  
• Y. Zhao & X. Ma, "Synthesis and Novel Properties of N-Phosphorylpeptide Acids", The 3rd National Conference on Org. Synth., Chengdu, China. October, 1989. Poster, A 83.
  
  
• J. Zhang & X. Ma, "The Study of the Reaction of (2-Benzothiazolyl)sulfenamide with Phosphorus-Containing Reagents". The 1st National Conference on Phosphorus Chem., Beijing, China. May, 1988, Poster, p 113.