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Photochemistry of codeinone derivatives. Asymmetric syntheses of enantiomerically pure 1,13-dihydroxydibenzazonines

✍ Scribed by Arthur G. Schultz; David M. Graves; Richard R. Jacobson; Fook S. Tham


Book ID
103397895
Publisher
Elsevier Science
Year
1991
Tongue
French
Weight
207 KB
Volume
32
Category
Article
ISSN
0040-4039

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Asymmetric Syntheses via Heterocyclic In
✍ Beulshausen, Tessa ;Groth, Ulrich ;SchΓΆllkopf, Ulrich πŸ“‚ Article πŸ“… 1991 πŸ› John Wiley and Sons 🌐 English βš– 297 KB πŸ‘ 1 views

## Abstract The titanium derivative 2 of the bislactim ether 1 of cyclo(‐L‐Val‐Gly‐) reacts with aldehydes and ketones 3 highly diastereoselectively to give the __syn__‐addition products 4. Upon hydrolysis with diluted trifluoroacetic acid the compounds 4 yield besides methyl L‐valinate the (2__R__