A Practical Aryl Unit for Azlactone Dynamic Kinetic Resolution: Orthogonally Protected Products and A Ligation-Inspired Coupling Process
作者:Sean Tallon、Francesco Manoni、Stephen J. Connon
DOI:10.1002/anie.201406857
日期:2015.1.12
The first strategy for bringing about enantioselectiveazlactonedynamickineticresolution to generate orthogonally protected amino acids has been developed. In the presence of a C2‐symmetric squaramide‐based catalyst, benzyl alcohol reacts with novel yet readily prepared tetrachloroisopropoxycarbonyl‐substituted azlactones to generate trapped phthalimide products of significant synthetic interest
The N-tetrachlorophthaloyl-(TCP-)amino protecting group has been evaluated for use in solid-phasepeptidesynthesis. The TCP group was unaffected by exposure to either piperidine or N,N-diisopropylethylamine (DIEA), which suggests compatibility with both Fmoc and Boc solid-phasesynthesis protocols. Quantitative TCP removal was achieved by treatment with hydrazine/DMF (3:17) at 35 °C for 30 min or with
New linear and macrocyclic arene–peptide hybrids may be synthesized from N-tetrachlorophthaloyl protected amino acids through mild phthalimide opening by 1,3-diaminopropane.
A new strategy for solid-phasesynthesis of C-terminal peptide amides based on the use of N-tetrachlorophthaloyl protected amino acids with acid-labile side-chain protection is described.
描述了基于N-四氯邻苯二甲酰基保护的氨基酸对酸不稳定的侧链保护的固相合成C末端肽酰胺的新策略。
NOELS, A. F.;DEMONCEAU, A.;PETINIOT, N.;HUBERT, A. J.;TEYSSIE, PH., TETRAHEDRON, 1982, 38, N 17, 2733-2739
作者:NOELS, A. F.、DEMONCEAU, A.、PETINIOT, N.、HUBERT, A. J.、TEYSSIE, PH.