Optical activity in nature

Addadi L, Lahav M (1979) in Walker DC (ed) Origins of optical activity in nature. Elsevier, New York, chapt 14... 

The asymmetric synthesis explains why most asymmetric compounds obtained from natural sources are optically active. In nature, the syntheses are carried out under the influence of optically active enzymes. The enzymes unite with the substance and when the synthesis is complete, they separate from the product and are again free to combine with fresh molecules of the original substance. 

D. C. Walker (ed.), Origins of Optical Activity in Nature , (Studies in Physical and Theoretical Chemistry, no. 7),... 

Properties White, translucent lumps sharp, cam-phorlike odor burning taste. Optically active in natural form, racemic form made synthetically. D 1.011, mp 208C, bp 212C. Soluble in alcohol and ether insoluble in water. Flammable. 

Origins of Optical Activity in Nature (Ed. D. C. Walker), Elsevier, New York, 1979 resolution of racemates by crystallization succeeds by Tamura s Preferential Enrichment in the mother liquor T. Ushio, R. Tamura, H. Taka-hashi, N. Azuma, K. Yamamoto, Angew. Chem. 1996, 108, 2544-2546 Angew. Chem. Int. Ed. Engl. 1996, 35, 2372-2374 R. Tamura, T. Ushio, H. Takahashi, K. Nakamura,... 

Bondy S.C. and Harrington M.E. (1979) The preparation high-affinity binding of the biological forms of amino acids and hexose stereoisomers to bentonite. Stud. Phys. Theor. Chem. 7, (Origin of Optical Activity in Nature), p. 141-149. 

Bonner W.A (1979) in Origin of Optical Activity in Nature, Stud. Phys. 

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