尽管在药物发现和开发中需要代谢物合成,但用于形成氧化芳族 CO 键的合成方法很少。我们报告了一种用于芳烃后期 CO 键形成的新方法。即使对于高度官能化的底物,该反应也以优异的官能团耐受性进行。所得的甲磺酸芳基酯提供了获取潜在的人类药物代谢物的途径,并可直接用于安装 CF 键以阻断代谢热点。试剂双(甲磺酰基)过氧化物和底物芳烃之间的电荷转移相互作用可能与芳烃相对于其他官能团的化学选择性官能化有关。
The present invention is a method for producing an aromatic compound by substituting the sulfonic acid group in a sulfonic acid aromatic-ester with a hydrogen atom in the presence of a platinum group metal catalyst, wherein an alkali metal carboxylate and/or an ammonium formate are made to coexist in the system. According to the present invention, an aromatic compound where the sulfonic acid group in a sulfonic acid aromatic-ester is substituted with a hydrogen atom, can be produced efficiently with good operability without using metal magnesium.
Process for the preparation of hydrogenated nitrile rubber
申请人:LANXESS Deutschland GmbH
公开号:EP2289620A1
公开(公告)日:2011-03-02
The present invention relates to a process for the production of hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art, wherein the process is carried out in the presence of hydrogen and optionally at least one co-olefin. The present invention further relates to the use of specific metal compounds in a process for the production of a hydrogenated nitrile rubber by simultaneous hydrogenation and metathesis of a nitrile rubber.
Process for the preparation of low molecular weight hydrogenated nitrile rubber
申请人:LANXESS Deutschland GmbH
公开号:EP2289621A1
公开(公告)日:2011-03-02
Pursuant to the invention a process for the production of hydrogenated nitrile rubber polymers having lower molecular weights and narrower molecular weight distributions than those known in the art in the is provided wherein the process is carried out in the presence of hydrogen and optionally at least one co-(olefin). The present invention further relates to the use of specific metal compounds in a process for the production of a hydrogenated nitrile rubber by simultaneous hydrogenation and metathesis of a nitrile rubber.
Ruthenium based catalysts for the metathesis of nitrile rubbers
申请人:LANXESS Deutschland GmbH
公开号:EP2289622A1
公开(公告)日:2011-03-02
The present invention relates to a process for the metathesis of nitrile rubbers in the presence of a specific catalyst for the metathetic degradation of nitrile rubber. The present invention further relates to specific novel metathesis catalysts and to the use thereof for the metathesis of nitrile rubbers.
Cuccovia, Iolanda M.; Da Silva, Marcia A.; Ferraz, Helena M.C., Journal of the Chemical Society. Perkin Transactions 2 (2001), 2000, # 9, p. 1896 - 1907
作者:Cuccovia, Iolanda M.、Da Silva, Marcia A.、Ferraz, Helena M.C.、Pliego Jr., Josefredo R.、Riveros, Jose M.、Chaimovich, Hernan