Development of an efficient liquid-phase peptide synthesis protocol using a novel fluorene-derived anchor support compound with Fmoc chemistry; AJIPHASE®
作者:Daisuke Takahashi、Takashi Yamamoto
DOI:10.1016/j.tetlet.2012.02.006
日期:2012.4
The development of a novel fluorene-type anchor support molecule and a liquid-phase peptide synthesis protocol (AJIPHASE®) is reported. With this support molecule, the synthesis of a protected peptide with a freecarboxylgroup could be carried out by repeated coupling/deprotection reactions and isolation by simple precipitation. Cleavage is performed under mild acidic conditions (2% TFA/CHCl3 or
Compounds comprising sulfated nonulonic acid having antiviral activity
申请人:Nissan Food Products Co., Ltd.
公开号:US06337390B1
公开(公告)日:2002-01-08
In order to provide the anti-retrovirus active compound with low anti-coagulant action and low cytotoxicity, compounds comprising glycoside or the salt thereof wherein lipid is linked to position 2 of sialic acid having all hydroxyl groups at positions 4, 7, 8 and 9 completely sulfated, or KDN (2-keto-3-deoxy-D-glycero-2-nononic acid) having all hydroxyl groups at positions 4, 5, 7, 8 and 9 completely sulfated are provided.
Abstract The synthesis of an original compound consisting of an azacrown ether interconnected with a diazacrown ether bearing an alkyl chain is described herein. This derivative is promising for numerous applications. GRAPHICAL ABSTRACT
2-amino-1,3-propanediol compound and immunosuppressant
申请人:Yoshitomi Pharmaceutical Industries, Ltd.
公开号:US05604229A1
公开(公告)日:1997-02-18
2-Amino-1,3-propanediol compounds of the formula (I) ##STR1## wherein R is an optionally substituted straight- or branched carbon chain, an optionally substituted aryl, an optionally substituted cycloalkyl or the like, and R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and each is a hydrogen, an alkyl, an aralkyl, an acyl or an alkoxycarbonyl, pharmaceutically acceptable salts thereof and immunosuppressants comprising these compounds as active ingredients. The 2-amino-1,3-propanediol compounds of the present invention show immunosuppressive action and are useful for suppressing rejection in organ or bone marrow tranplantation, prevention and treatment of autoimmune diseases or as reagents for use in medicinal and pharmaceutical fields.
Monofunctional (Dimethylamino)silane as Silylating Agent
作者:Katalin Szabó、Ngoc Le Ha、Philippe Schneider、Peter Zeltner、Ervin sz. Kováts
DOI:10.1002/hlca.19840670813
日期:1984.12.19
The reaction of triorganyl(dimethylamino)silanes with surface-hydrated silicon dioxide has been studied. These silylatingagents are easy to prepare from the corresponding chloro or bromosilanes with dimethylamine. The resulting products are thermally stable and relatively volatile. Reaction with surface-hydrated silicon-dioxide preparations at 150–250°C for 170 h yields a dense grafted layer. However