Isopropenyl chlorocarbonate (IPCC)1 in amino acid and peptide chemistry: Esterification of N-protected amino acids; Application to the synthesis of the depsipeptide valinomycin
Esterification of N-protected α-amino acids was achieved via isopropenyl chlorocarbonate (IPCC) activation. In situ alcoholysis of the unstable mixed anhydride intermediate was catalyzed by 4-(dimethylamino)pyridine (DMAP). Competing isopropenyl ester formation was negligible when using methylene chloride as the solvent. A variety of esters from primary and secondary alcohols were obtained with good
Synthese des depsipeptides valinomycin nach der festphasenmethode
作者:G. Losse、H. Klengel
DOI:10.1016/s0040-4020(01)98008-1
日期:1971.1
The linear sequence H-(D-Val-L-Lac-L-Val-D-Hyv-)3OH of the cyclododeca-depsipeptide valinomycin was synthesized using three parallel methods: (1) homogeneous phase by stepwise N-terminal lengthening of H-L-Val-D-Hyv-OBzl with Boc-aminoacyl-hydroxy-acids; (2) on the same principle by solid-phase-synthesis on hydroxymethyl-polystyrene as well as; (3) by twofold fragment-condensation of H-D-Val-L-Lac-L-Val-D-Hyv-O-
The present disclosure relates to Silstatin compounds, pharmaceutical compositions comprising such compounds, kits, and methods for using such compounds or pharmaceutical compositions.
本公开涉及西司他丁化合物、包含此类化合物的药物组合物、试剂盒以及使用此类化合物或药物组合物的方法。
ZEGGAF, CH.;PONCET, J.;JOUIN, P.;DUFOUR, M. -N.;CASTRO, B., TETRAHEDRON, 45,(1989) N6, C. 5039-5050
作者:ZEGGAF, CH.、PONCET, J.、JOUIN, P.、DUFOUR, M. -N.、CASTRO, B.
DOI:——
日期:——
SILSTATIN COMPOUNDS
申请人:Pettit George Robert
公开号:US20180030095A1
公开(公告)日:2018-02-01
The present disclosure relates to Silstatin compounds, pharmaceutical compositions comprising such compounds, kits, and methods for using such compounds or pharmaceutical compositions.