ASMS 2009
Stereoisomer Generation
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Stereoisomer generation is important in analytical sciences, natural product synthesis and metabolomics. Stereoisomers include tetrahedral (R/S) and double bond isomers (cis/trans). The can be generated with different programs. One of the easiest way is to use Marvin [JAVA Webstart].
Literature
Marvin created 512 stereoisomers (2^8) for sucrose and those structures can be saved or other properties can be calculated. A good way of handling those structure files is storing them in Instant-JChem and doing some more calculations there. The number of stereoisomers is usually (2^n) where n refers to chiral centers, but sometimes also less (example: CC(O)C1=C(C(C)O)C(C(C)O)=C1C(C)O has 7 stereoisomers), CC(O)C1C(C(C)O)C(C(C)O)C1C(C)O has 39 stereoisomers see [LIT].
Literature
- Stereoisomer generation in computer-enhanced structure elucidation
- Exhaustive Generation of Organic Isomers. 6. Stereoisomers
Having Isolated and Spiro Cycles and New Extended N_Tuples - Understanding Topological Symmetry: A Heuristic Approach to Its Determination
- Manual Construction and Mathematics- and Computer-Aided Counting of Stereoisomers.
The Example of Oligoinositols
- All 32768 maltotriose stereoisomers generated with JChem cxcalc (SMILES zipped) [ZIP]
- All 50313 stereoisomers (50308 unique) from all 13190 isomers of C8H16O2 (SMILES ZIP) [ZIP] [InChI]
- MOLGEN View (Molview.exe) has a routine for calculation of isomers (does not handle all cases, no export)
- CACTVS can calculate stereoisomers (not all cases)
- depth-first blog discusses some issues
Created by
zwluxx
Last modified 2009-11-22 06:56 PM
Last modified 2009-11-22 06:56 PM
