摘要:
The present invention relates to a new process for preparing 3-O-(sodium(5-acetamide-3,5-dideoxy-alpha-D-glycero-D-galacto-2-noneuro pyranosyl)onate-1,2-di-O-tetradecyl-Sn-glycerol (3).
摘要:
Sialocylglycerolipids represented by the following general formula: wherein R 1 represents a hydrogen atom or a group CH 3 CO-; R 2 represents an alkali metal, a hydrogen atom or a lower alkyl group; R 3 represents a hydrogen atom or a group C n H 2n+1 - (n is an integer ranging from 1 to 30); and R 4 represents a group C m H 2m+1 - (m is an integer ranging from 1 to 30) are herein disclosed. They are prepared by treating a corresponding compound in an alkaline aqueous solvent. The method makes it possible to provide these compounds in a high yield by a simple processes.
摘要:
The present application discloses a new sialosyl glyceride having the following formula, which compound is useful as a remedy for nervous diseases, has an excellent compatibility with the living bodies, and is easily producible. wherein R¹ represents a hydrogen atom or XCH₂CO- (X being a halogen atom), R² represents an alkali metal, a hydrogen atom or a lower alkyl group, R³ represents a hydrogen atom or -CO(CH₂)mCH₃, R⁴ represents -CO(CH₂)mCH₃ and m and n each represents a number of 0 to 30.
摘要:
Sialocylglycerolipids represented by the following general formula: wherein R 1 represents a hydrogen atom or a group CH 3 CO-; R 2 represents an alkali metal, a hydrogen atom or a lower alkyl group; R 3 represents a hydrogen atom or a group C n H 2n+1 - (n is an integer ranging from 1 to 30); and R 4 represents a group C m H 2m+1 - (m is an integer ranging from 1 to 30) are herein disclosed. They are prepared by treating a corresponding compound in an alkaline aqueous solvent. The method makes it possible to provide these compounds in a high yield by a simple processes.
摘要翻译:由以下通式表示的唾液酸甘油脂:其中R 1表示氢原子或基团CH 3 CO-; R 2表示碱金属,氢原子或低级烷基; R 3表示氢原子或C n H 2n + 1-(n为1〜30的整数)的基团。 并且R 4表示基团C m H 2n + 1 - (m为1至30的整数)。 它们通过在碱性水溶剂中处理相应的化合物来制备。 该方法可以通过简单的方法以高产率提供这些化合物。
摘要:
A sialic acid derivative having an active carbonyl group represented by the formula [I]: (wherein R' represents hydrogen or acetyl group; R 2 represents hydrogen, a metal or a lower alkyl group; R 3 represents hydrogen, hydroxyl group, or a residue removed hydrogen from an alcohol portion of an active ester; Ac represents acetyl group; and n is 1 to 20, respectively). This sialic acid derivative [I] can be utilized as a starting material for various complex having a sialic acid in the molecule since it has an active carbonyl group in the molecule so that it shows high reactivity.
摘要:
This invention provides a novel compound having a formula such as This invention also provides a process for preparing such a compound. The novel compound has excellent immunological activity.
摘要:
This invention provides a novel compound having a formula such as or This invention also provides a process for preparing such a compound. The novel compound has an excellent immunological activity.
摘要:
Sialic acid derivative with active ester groups expressed with the formula [I] Where R 1 denotes hydrogen or acetyl group, R 2 hydrogen or lower alkyl group, R 3 C 2 H 4 , C 3 H 6 or C 2 H 2 , R 4 hydroxyl group, residue left after removing hydrogen from the alcohol portion of active ester or alkyloxycarbonyloxy group, Ac acetyl group, Ph phenyl group, X oxygen or sulfur. This sialic acid derivative has high reactivity because it has active ester groups in molecules and can be used as raw material or intermediate for synthesis of various sialic acid derivatives.