87215-41-6Relevant articles and documents
Synthesis of novel all-cis-functionalized cyclopropane template-assembled collagen models
Yamazaki,Sakamoto,Suzuri,Doi,Nakazawa,Kobayashi
, p. 1870 - 1875 (2007/10/03)
An all-cis-functionalized cyclopropane template to connect the three peptide chains in a collagen model is designed. Stereoselective synthesis of cyclopropane-assembled collagen-model 2b with the minimum unit of Gly-Pro-Pro is based on a novel 1-seleno-2-silylethene [2 + 1] cycloaddition strategy. Reaction of the 1-seleno-2-silylethene 4 with triester-substituted olefin 5 in the presence of ZnI2 gives [2 + 1] cycloadduct 6 stereoselectively. Cyclopropane 6 is selectively transformed into triol 10 in four steps. The reaction of 10 and three equivalents ofN-Boc-Pro-Pro-Gly-OH in the presence of WSC-DMAP and subsequent deprotection with TFA gives 2b.
STUDIES OF BITTER PEPTIDES FROM CASEIN HYDROLYZATE - VII. BITTERNESS OF THE RETRO-BPIa (VAL-ILE-PHE-PRO-PRO-GLY-ARG) AND ITS FRAGMENTS.
Shigenaga,Otagiri,Kanehisa,Okai
, p. 103 - 107 (2007/10/02)
To explain the bitter taste exhibited by BPIa (Arg-Gly-Pro-Pro-Phe-Ile-Val) which was isolated from casein hydrolyzate, the authors propose the following requirement: its characteristic spatial structure: the basic moiety in the N-terminal and the hydroph