## Abstract For optimizing the catalytic tritiation of peptides, the catalytic deuteration of buserelin and DhP^9^‐buserelin^1^ in DMA after reaction of DhP^9^‐buserelin were comparable in both solvents. The nonspecific incorporation of deuterium found after deuteration of buserelin was clearly low
Investigation of the catalytic deuteration of N-acetyl-DL-3,4-dehydroproline amide
✍ Scribed by J. Oehlke; H. Niedrich; H.-J. Zöpfl; P. Franke
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- French
- Weight
- 287 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
As a model for the tritium labelling of peptides the catalytic deuteration of N-acetyl-OL-3,4-dehydroproline amide was investigated by means of mass spectrometric measurements. The unwanted incorporation of hydrogen instead of deuterium, found especially in the presence of water, was compensated partially by an incorporation of deuterium proceeding additionally to the saturation of the double bond. Both effects were most intensive in the presence of water and rose with ascending catalyst amounts and descending pH.
📜 SIMILAR VOLUMES
amide solvent hydrogen was incorporated instead of deuterium up to an order of 70%. The major part of the solvent hydrogen was shown to be introduced into the reaction product independently of the dilution of the reacting gas. This direct transfer depends on type of solvent and catalyst and on the c
## S m a r y QS a model for the tritium l a b e l i n g of peptides, the c a t a l y t i c dehalogenation of B-Acetyl-L-4-chloro-and N-Acetyl-L-4-iodophenylalanine emide was investigated in the presence of deuterium, using d i f f e r e n t reaction conditions. A catalyst-mediated t r a n s f e r
## Abstract The crystal structures of L‐3,4‐dehydroproline, __t__‐butoxycarbonyl‐L‐3,4‐dehydroproline amide, and acetyl‐L‐3,4‐dehydroproline amide have been determined. L‐3,4‐Dehydroproline is orthorhombic with __a__ = 16.756, __b__ = 5.870, __c__ = 5.275 Å, and __Z__ = 4; __t__‐butoxycarbonyl‐L‐3,
## Abstract The influence of the mode of presaturating the catalyst and of different inhibiting agents on the catalytic deuteration of N‐acetyl‐3,5‐di‐iodo‐L‐tyrosineamide was investigated in order to derive conclusions for optimizing peptide tritiations. Reactions of the activated catalyst with so