Cyclic tetrasaccharides

Mukai, K., Watanabe, H., Oku, K., Nishimoto, T., Kubota, M., Chaen, H., Fukuda, S., and Kurimoto, M. 2005. An enzymatically produced novel cyclic tetrasaccharide, cyclic maltosyl-(l-6)-maltose from starch. Carb. Res., 340,1469-1474. 

Cerven, D.R. (2004a) Acute oral toxicity/LD 50 In rats. Cyclic tetrasaccharide (CTS) syrup. Cyclic tetrasaccharide (CTS) crystal. Unpublished report from MB Research Laboratories, Spinnerstown, PA, USA, for Hayashibara International Inc., Westminster, MA, USA. Submitted to WHO by MB Research Laboratories, 25 May 2004. 

Matsuo, T. (2005) Cyclic tetrasaccharide delays cataract formation in the lens in vitro. Cell Preserv. Technd. 3, 238-243. 

Ott, M. (2003a) Cyclic tetrasaccharide primary eye irritation study in rabbits. Unpublished study No. 849175 from RCC Ltd for Hayashibara Biochemical Laboratories, Inc., Okayama, Japan. Submitted to WHO by RCC Ltd, Itingen, Switzerland. 

Inoue et al. reported the enantio- and diastereo-selective [4 + 4] photocycloaddition of 2-anthracenecarbo ylic acid (243) and its derivatives under various reaction conditions (Scheme 52). " Photocyclodimerization of 2-anthracenecarbo ylate tethered to a cyclic tetrasaccharides gave a single chiral cyclodimer in 99% optical and 96% chemical yields. Mutant human serum albumins accelerated the photodimerization of 2-anthra-cenecarbo ylate (238) to give cyclodimers in 75-85% enantiomeric excesses. The photocyclodimerization of 2,6-anthracenedicarbo ylic acid (244) was also investigated to afford chiral cyclodimers. ... 

Fig. 32 Polycondensation of disaccharide monomer 86 leading to the formation of linear tetrasaccharide 87 and trace amount of cyclic tetrasaccharide 89. ...

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