Synthesis and spectroscopic characterization of R3SnIV derivatives of N-acetyldipeptides
β Scribed by Friedo Huber; Michael Vornefeld; Giuseppe Ruisi; Renato Barbieri
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 652 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0268-2605
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## 1. Introduction. -Starting from the optically pure hydroxyketone 1, an efficient synthesis of (3R,3'R)-zeaxanthin (2) was described recently [l]. The final step involves a double Wittig condensation. Developmental efforts to improve the yield of 2 have Scheme. Synthesis of (2.E)-Zeaxanthenals an
Four compounds of the type [ ( o -R N H -C , H ~C O O ) ( C H ~C H ~C H ~C H ~) ~S ~] ~O and [(o-CH3NH-CgHqCOO)(CH3)2Sn]120 have been prepared, characterized by 'H, 13C, ' 19Sn NMR, and by Mbssbauer and mass spectrometry. They have been tested in vifro against two human tumour cell lines, nl. MCF-7