Khan’s method

Khan S.H. and O Neill R.A. (eds) (1996) Modem Methods in Carbohydrate Chemistry, Harwood Academic, Amsterdam. 

Khan, S. H. O Neill, R. A., Eds. Modem Methods in Carbohydrate Synthesis, Harwood Academic Amsterdam, 1996. 

Kim, H.S., Cho, N.J., and Khan, S.N. (2008) 7 alpha aminosteroid derivatives or pharmaceutically acceptable salts thereof, preparation method thereof and composition for anticancer or antibiotics containing the same as an active ingredient. Patent No. WO038965 Al (South Korea). 

Two years later Taqui Khan et al. [108] published another paper which described similar experiments in more detail. The rate of ammonia production was given as 6.8 moles NH3 per mole of catalyst per hour. It appears that the term the catalyst referred to the ruthenium complex 1 rather than to CdS. The maximum yield of ammonia and the initial rate of ammonia production varied directly with the initial concentration of 1. Ammonia was determined in the reactor and in HC1 traps by Nessler s method. Yields were shown on a graph, with a maximum yield of approximately 0.065 mol. We note that this is an exceptionally large amount of ammonia from photosynthesis and that photon efficiencies of several percent are implied. 

Lassiter, S.J., Stryjewski, W., Owens, C.V., Elanagan, J.H., Jr., Hammer, R.P., Khan, S., and Soper, S.A., Optimization of sequencing conditions using near-infrared lifetime identification methods in capillary gel electrophoresis, Electrophoresis, 23, 1480, 2002. 

Agarwal D C, Kumar A, Khan S A, Kabiraj D, Singh F, Tiipathi A, Pivin J C, Chauhan R S, Avasthi D K, SHI induced modification of ZnO thin film Optical and structural studies, Nucl. Instrum. Methods Phys. Res. B, 244, 136-140, 2006. 

Prasad, KV. Abel, M. S. Khan, S. K. (2000). Momentum and heat transfer in viscoelastic fluid flow in a porous medium over a non-isothermal stretching sheet, Int. ]. Numer. Method Heat flow, 10, pp. 786-801, ISSN 0961-5539. 

Md Nasim Khan, S. Pal, T. Parvin, L.H. Choudhury, A simple and efficient method for the fficile access of highly functionalized pyridines and their fluorescence property studies, RSC Adv. 2 (2012) 12305-12314. 

All derivatives used were prepared by essentially standard literature procedures and had physical constants in accord with previously reported values. Furthermore, the P.M.R. spectra were in each case consistent with the assigned structures. All solutions were concentrated under reduced pressure and m.p. s are uncorrected. (I) 2-Deoxy-D-arafczno-hexopyranose was a commercial sample from Pfanstiehl Lab. Inc., Waukegan, Illinois and was used without further purification. (II) 3, 4, 6-Tri-O-acetyl-D-glucal (1) was a commercial sample from Aldrich Chem. Co., Milwaukee, Wisconsin and was purified by distillation and recrystallized three times from aqueous ethanol. (Ill) 1, 3, 4, 6-tetra-0-acetyl-2-deoxy-a-D-arahino-hexopyranose (4) was prepared by the method of Bonner (11) while the corresponding / -anomer (5) was synthesized following the procedure of Overend, Stacey, and Stanek (47). (IV) 5, 6-Dideoxy-1, 2-0-isopropylidene-a-D-xj/io-hex-5-enofuranose (20) was provided by A. Rosenthal and G. Khan of this Department. 

T. Norberg, in S. H. Khan and R. A. O Neill (Eds.), Modern Methods in Carbohydrate Synthesis, pp. 82-106, Harwood Academic Publishers, 1995, and references therein. 

Ganzera M, Zhao J, Khan lA. Hypericum perforatum—chemical profiling and quantitative results of St. John s Wort products by an improved high-performance liquid chromatography method. J Pharm Sci 2002 91(3) 623-630. 

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