7、Several enzymatic methods, including enzyme catalyzed enantioselective synthesis and kinetic resolution, for the preparation of optically active cyanohydrins are reviewed.
11、When carries various chemical modifications on double helical molecular of optically active, we can always gain derivatives which have specific properties.
1、Racemization is found with optically active substrates.
5、Chiral synthesis can be achieved by taking advantage of natural or synthetic optically active compounds.
10、As important choral intermediates, optically active alcohols were widely used in the production of pesticide and liquid crystals for their vital useful value, widely interesting have been aroused.
2、Conversion of an optically active substance to a racemic form.
8、A new optically active monomer of 4(S)—2—Methyl—4—Methoxycarbony1—2—Oxazoline has been synthesized from L—serine.
14、"The two enantiomers rotate polarized light through opposite angles, canceling each other out so that the racemic mixture has no optical activity. Racemization is the conversion of an optically active form of a compound into a racemic mixture; reversing this process is called resolution. "
9、This article introduces the application of hydrolases, oxidoreductases and their enzyme sources in the synthesis of optically active drugs. 29 references are presented.
4、Optically active polyamide-imide progress abroad was studied. Summarizes the synthesis of optically active polyamide-imide, solubility and thermal stability changes ment.
3、Racemization is found with optically active substrate substrates.
6、Alternatively, the compound of the invention may be prepared using optically active reactants.
13、However, if optically active reagents are being used it would be important to avoid the pH range above 6, as at the higher pH range interconversion of the free compound of Formula I occurs.
12、The method of using optically active phenylglycine butyl ester as resolution agent can obtain the higher yield, and it is easy to operate. So it is suitable for industrial production.
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