SYNTHESIS OF (2s , 4S)-[5-l 3C] LEUC INE , (2R ,4S)-[5-' 3C] LEUC I NE , AND (2RS)-[1 ,2-13C,] LEUCINE D. John Aberhart\* and Bruce H. W e i l l e r The Worcester Foundation f o r Experimental B i o l o g y Shrewsbury, Massachusetts 01545 SUMMARY (2RSY3S)-[4-13 ClVal i n e was d i a z o t i z e d an
Synthesis of [2-13C, 4-13C]-(2R,3S)-catechin and [2-13C, 4-13C]-(2R,3R)-epicatechin
✍ Scribed by Pradeep K. Sharma; Min He; Leo J. Romanczyk Jr; Hagen Schroeter
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- French
- Weight
- 196 KB
- Volume
- 53
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The first synthesis of doubly labeled, [2‐^13^C, 4‐^13^C]‐(2__R__,3__S__)‐catechin 15 and [2‐^13^C, 4‐^13^C]‐(2R,3__R__)‐epicatechin 18 starting from labeled 2‐hydroxy‐4, 6‐bis(benzyloxy)acetophenone 3 and labeled 3, 4‐bis(benzyloxy)‐benzaldehyde 7 are described. Copyright © 2010 John Wiley & Sons, Ltd.
📜 SIMILAR VOLUMES
2-Ethoxy-1-methyl-5-pymlidinone (1) was reacted with ethyl [3,4-'3C2]acetoacetate (2) in the presence of T i c 4 to give ethyl [3,4-13C2]-2-( 1'-methyl-5'oxo-2'-pyrrolidinyl)-3-oxobutanoate (3) in 85% yield. Decarboethoxylation of ethyl [3,4-13C2]-2-( l'-methyl-5'-oxo-2'-pyrrolidiny1)-3-oxobutanoate
## Abstract An efficient ^13^C‐labelling synthesis of the putative erythromycin biosynthetic intermediate, __S__‐2‐acetylaminoethyl (2__R__,3__R__,4__R__,5__R__)‐3,5‐diacetoxy‐2,4‐dimethyl‐4‐([^13^C]methoxy)heptanethioate, which would be useful for the investigation of the chain elongation mechanis
CIQuinoline and [3-Clquinoline were synthesised by a five-step process starting from isatin. Acetylation of isatin with acetyl chloride labelled in either the 1or 2-position, was followed by the Pfitzinger reaction to give 2-hydroxy-4-quinoline carboxylic acid labelled in the 2- or 3-position. Dec
## Abstract [4‐^13^C]‐porphobilinogen 1a, [3‐^13^C]‐porphobilinogen 1b and [11‐^13^C]‐porphobilinogen 1c are prepared from [1‐^13^C]‐3‐(tetrahydropyran‐2′‐yloxy)‐propionaldehyde 2a, methyl [4‐^13^C]‐4‐nitrobutyrate 3b and [1‐^13^C]‐isocyanoacetonitrile 5c, respectively. The building blocks 2, 3 and