Preparation and opioid activity of analogs of the analgesic dipeptide 2,6-dimethyl-L-tyrosyl-N-(3-phenylpropyl)-D-alaninamide
摘要:
A number of analogues of the recently disclosed analgesic dipeptide 2,6-dimethyl-L-tyrosyl-D-alanine-phenylpropylamide (SC-39566,2) were prepared. These analogues contained oxymethylene, aminomethylene, ketomethylene, bismethylene, and trans double bond (including vinyl fluoride) isosteric replacements for the amide bond between the D-alanine and phenylpropylamine units in 2. These compounds were tested in opioid binding assays and in the mouse writhing assay for analgesic activity. Though not as potent as 2, the oxymethylene, and trans double bond isosteres showed analgesic activity. The aminomethylene analogues also showed binding activity in subnanomolar concentrations at the mu-receptor. The amide bond between 2,6-dimethyl-L-tyrosine and D-alanine units seems to be critical for opioid activity.
Electrophilic Iron Catalyst Paired with a Lithium Cation Enables Selective Functionalization of Non‐Activated Aliphatic C−H Bonds via Metallocarbene Intermediates
Combining an electrophilic iron complex [Fe(F pda)(THF)]2 (3) [F pda=N,N'-bis(pentafluorophenyl)-o-phenylenediamide] with the pre-activation of α-alkyl-substituted α-diazoesters reagents by LiAl(ORF )4 [ORF =(OC(CF3 )3 ] provides unprecedented access to selective iron-catalyzed intramolecular functionalization of strong alkyl C(sp3 )-H bonds. Reactions occur at 25 °C via α-alkyl-metallocarbene intermediates
Dialkyl 3-monosubstituted glutarates are subjected to hydrolysis with pigliveresterase to afford the corresponding chiral half-esters. Synthetically useful half-esters of higher optical purity are obtained from the prochiral substrates of more hydrophobic nature.
Mass spectrometry in structural and stereochemical problems. CCXV. Behavior of phenyl-substituted .alpha.,.beta.-unsaturated ketones upon electron impact. Promotion of hydrogen rearrangement processes
作者:R. J. Liedtke、A. F. Gerrard、J. Diekman、Carl Djerassi
DOI:10.1021/jo00970a025
日期:1972.3
Tetrahydronaphthalene Derivatives by Amberlyst® 15-Promoted Friedel-Crafts Cyclizations
作者:Richard A. Bunce、Andrew N. Cox
DOI:10.1080/00304940903523553
日期:2010.2.2
EISTETTER, K.;WOLF, H. P. O., J. MED. CHEM., 1982, 25, N 2, 109-113