They are not only important intermediate synthon in organic synthesis but also the potent compounds with the broad spectrum pharmacological activity and biological activity .

它们不仅是有机合成中的重要 合成 子和中间体，同时还具有广谱药理活性和生物活性的。

Natural natural Synthon ⅱ and model construction were defined .

定义了天然 合成 子、 第二级天然 合成 子和模式结构。

The Synthesis of A - Ring Synthon for 19 - Nor - 1a 25 - Dihydroxyvitamin D_3

19-失碳-1α，25-二羟基维生素D 3A 环合成 子的合成

The synthesis of an optically active A - ring synthon 4 for 19 - Nor - la 25 - dihydroxyvitamin D3 has been achieved from D - ( - ) - quinic acid in 9 steps and with high overall yield .

报道以价廉、易得的D-（-）-奎尼酸为手性源，经9步 反应，有效地合成光学活性的19-失碳-1α，25-二羟基维生素D 3A 环合 成 子4的合成方法。

Then coupling with A ring synthon closing deprotection the aim product was synthesized finally .

然后再与A环合 成 子偶联、 关环、脱保护完成目标产物的 全合成。

Studies on the process of rapid dyeing of thin fabric of synthon

用快速染色法染 合纤薄型织物的工艺探讨

In this paper The reasonable approaches of organic synthesis have been designed to use analytic and examinatorial program by means of corey 's concept of synthon and disconnection in the meantime some common synthetic tactics have been suggested .

本文以Corey的 合成 子和切断为手段，利用分析程序和审查程序对有机反应路线进行合理设计，并提出了一些常用的合成策略。

The concept and principle of synthon method was described in this article and the concrete analysis was made through the synthetic examples of some natural products and drugs .

叙述了 合成 子法的概念和原理。并通过一些天然产物和药物合成的例子，进行具体分析，使 读者 了解 合成 子的概念和应用。

Optically active ethyl ( S ) - 3-hydroxybutyrate a useful chiral synthon was prepared by stereoselective reduction of ethyl acetoacetate of the bread yeast in organic solvent .

利用面包酵母在 非 水 相中不对称还原乙酰乙酸乙酯，制备了光学活性的手性化合物S（）-3-羟基丁酸乙酯。通过 转化 率 和 ee。

Allylic Geminal Diacetates as a ~ 1 a ~ 3 Synthon & A Convenient Synthesis of Bicyclo 3.3.1 w_1080 nonan-9-one Derivatives and its Mechanism

烯丙基 -1偕二醇二醋酸酯作为a~1、a~3 合成 子的研究&合成双环3.3.1 w_1104壬烷-9-酮衍生物的简便方法及其反应机理

The Synthesis of The Synthon For 1O-Methyl PGD_2

10-甲基 -PGD2的 合成 子的合成

The hydroxy of the chiral source D-mannitol was protected via the formation of acetal and benzyl ether and then chiral synthon 4 was prepared after the deprotection and oxygenolysis of the protected D - mannitol .

以D甘露醇作为手性源，分别通过形成缩醛和苄醚对羟基进行保护，然后脱缩醛、氧化裂解得到手性 子4。

Methods The S - ( - ) - timolol is prepared from a chiral synthon D-mannitol .

方法我们从手性 合成 子D-型甘露醇开始制备S-型噻吗洛尔。