✦ LIBER ✦
Photochemistry of threeN-acetoacetyl amino acid methyl esters: structure elucidation of the radiation products by gas chromatography/mass spectrometry
✍ Scribed by Budzikiewicz, H.; Dallakian, P.; Griesbeck, A. G.; Heckroth, H.
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 115 KB
- Volume
- 33
- Category
- Article
- ISSN
- 1076-5174
No coin nor oath required. For personal study only.
✦ Synopsis
The photochemistry of three N-acetoacetyl a-amino acid (valine, tert-leucine, isoleucine) methyl esters was investigated. The products after UV irradiation in acetonitrile at 300 nm (direct excitation) were analyzed by gas chromatography coupled with chemical ionization mass spectrometry. In all cases a complex product mixture was found as the result of the np* excitation of the substrates. The major reaction paths were Norrish type I reactions and hydrogen atom abstractions with concomitant radical cleavage and radical recombination steps. John