A Highly Efficient Chemoselective Cyclocondensation of threo-(1S,2S)-2-Amino-1-(4-nitrophenyl)-1,3-propanediol with Ketones and Isomerization of the Condensates
β Scribed by Zixing Shan; Boyong Wan; Guoping Wang
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- German
- Weight
- 89 KB
- Volume
- 85
- Category
- Article
- ISSN
- 0018-019X
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π SIMILAR VOLUMES
In principle, there are least four conformations in which the linker arm can join the uppermost melamine ring in 4 to the central benzene "hub' 121. Additionally. adjacent melamine rings in each arm of the Hub(MMM), unit can lie in eclipsed or staggered conformations, resulting in a total of at l e
Some L-and D-amino acids (Phe or Leu) were derivatized with a fluorogenic reagent, 4-fluoro-7-nitro-2,1,3benzoxadiazole (NBD-F) and separated on a Pirkle-type column, Sumichiral OA 2500(S) [(S)-1-naphthylglyeyl-3,5-dinitrophenylamide silica gel] with a mobile phase of 20mM ammonium acetate in methan