Transkarbams as transdermal permeation enhancers: Effects of ester position and ammonium carbamate formation
摘要:
Transkarbam 12, an ammonium carbamate formed by the reaction of dodecyl 6-aminohexanoate with carbon dioxide, is a highly active, broad-spectrum, nontoxic, and nonirritant transdermal permeation enhancer. It probably acts by a dual mechanism: a part of its activity is associated with the carbamic acid salt and/or its decomposition in the acidic stratum corneum. The ammonium ester thereby released is an active enhancer species as well, and its activity highly depends on the position of the ester group. (C) 2010 Elsevier Ltd. All rights reserved.
开发了一锅法,用于在氨基酸盐酸盐的存在下,从二辛基或二癸基氧化膦,甲醛和氨基酸以高收率合成天然氨基酸的亲脂性N-(二烷基磷酰基甲基)衍生物。与某些氨基酸的反应在冠醚的催化下也是有效的。分离的N-(二烷基磷酰基甲基)和N,N-双(二烷基磷酰基甲基)氨基酸的结构是根据1 H,13 C和31 P NMR和质谱确定的。(S)-N的结构通过X射线分析证实了-[[(二环己基磷酰基)甲基]-α-丙氨酸,并表征了其分子在晶体中的分子间缔合。研究了新型磷酸化氨基酸相对于多官能团羧酸的膜传输特性,并估算了影响酸性底物膜传输效率和选择性的因素。揭示了通过含有N,N-双[(二辛基磷酰基)甲基]-β-丙氨酸的液膜选择性提取戊二酸。
Cu(I)-Catalyzed Synthesis of Dihydropyrimidin-4-ones toward the Preparation of β- and β<sup>3</sup>-Amino Acid Analogues
作者:Basker Rajagopal、Ying-Yu Chen、Chun-Chi Chen、Xuan-Yu Liu、Huei-Ren Wang、Po-Chiao Lin
DOI:10.1021/jo402670d
日期:2014.2.7
A copper(I)-catalyzed synthesis of substituted dihydropyrimidin-4-ones from propargyl amides via the formation of ketenimine intermediate has been successfully developed; the synthesis afforded good isolated yields (80–95%). The mild reaction conditions at room temperature allow the reaction to proceed to completion in a few hours without altering the stereochemistry. Further, by involving a variety
“Switch off/switch on” regulation of drug cytotoxicity by conjugation to a cell targeting peptide
作者:Yossi Gilad、Michael A. Firer、Alex Rozovsky、Elena Ragozin、Boris Redko、Amnon Albeck、Gary Gellerman
DOI:10.1016/j.ejmech.2014.07.073
日期:2014.10
Bi-nuclear aminoacid platforms loaded with various drugs for conjugation to a peptide carrier were synthesized using simple and convenient orthogonally protective solid-phase organic synthesis (SPOS). Each arm of the platform carries a different anticancer agent linked through the same or different functional group, providing discrete chemo- and bio-release profiles for each drug, and also enabling
preferable for expression of potent analgesicactivity, and that the free carboxyl group is superior in its analgesicactivity to that of the esterified or amidated carboxy group at the C-terminal. In addition, N-methylation of the amide bond at the 4th position contributed to improved analgesicactivity. These results indicated that the strong and long-lasting analgesic effect of ADAMB is expressed by
Amidoheterocycles as modulators of the melanocortin-4 receptor
申请人:——
公开号:US20040224901A1
公开(公告)日:2004-11-11
Novel azetidinyl and pyrrolidinyl compounds are ligands of melanocortin-4 receptors and are useful for treating conditions responsive to the modulation of melanocortin-4 receptors such as obesity, diabetes, and sexual dysfunction.
1
[EN] GLUCAGON RECEPTOR ANTAGONISTS, PREPARATION AND THERAPEUTIC USES<br/>[FR] ANTAGONISTES VIS-A-VIS DES RECEPTEURS DU GLUCAGON, ELABORATION ET UTILISATIONS THERAPEUTIQUES
申请人:LILLY CO ELI
公开号:WO2005118542A1
公开(公告)日:2005-12-15
The present invention discloses novel compounds of Formula (I), or pharmaceutically acceptable salts thereof, which have glucagon receptor antagonist or inverse agonist activity, as well as methods for preparing such compounds. In another embodiment, the invention discloses pharmaceutical compositions comprising compounds of Formula (I) as well as methods of using them to treat diabetic and other glucagon related metabolic disorders, and the like.