Intermediates in pharmaceutical camptothecin preparation
申请人:Glaxo Wellcome Inc.
公开号:US05491237A1
公开(公告)日:1996-02-13
A process of providing novel compounds of Formula (I) below, which are useful as intermediates in the preparation of camptothecin and camptothecin-like compounds, ##STR1## wherein: R.sup.1 represents alkyl, particularly methyl, R.sup.2 represents H or alkyl, particularly methyl, R3 represents H or alkyl, particularly H; Q represents triflate or halo particularly bromo and iodo more particularly iodo and Y represents H, chloro or OR.sup.4, wherein R.sup.4 represents alkyl or triflate, or particularly H.
Intermediates and method of making camptothecin and camptothecin analogs
申请人:North Carolina State University
公开号:US05162532A1
公开(公告)日:1992-11-10
Compounds of Formula I ##STR1## are made in accordance with the following scheme: ##STR2## wherein R may be loweralkyl; R.sub.1 may be H, loweralkyl, loweralkoxy, or halo; R.sub.2, R.sub.3, R.sub.4, and R.sub.5 may each independently be H, amino, hydroxy, loweralkyl, loweralkoxy, loweralkylthio, di(loweralkyl)amino, cyano, methylenedioxy, formyl, nitro, halo, trifluoromethyl, aminomethyl, azido, amido, hydrazino, or any of the twenty standard amino acids bonded to the A ring via the amino-nitrogen atom; Y is H and W and X are halogen. Also disclosed are novel processes for making starting materials for the scheme given above, and novel intermediates employed in these processes.
Methods and intermediates for the assymmetric synthesis of camptothecin
申请人:North Carolina State University
公开号:US05212317A1
公开(公告)日:1993-05-18
Processes for making compounds of Formulae XIV, XV, and XVII ##STR1## wherein R.sub.6 is lower alkyl, R.sub.7 is lower alkyl, R is lower alkyl, Y is H, F or Cl, R.sub.8 is a moiety of Formula XVIII ##STR2## wherein n is 1, 2, or 3, R.sub.11 is C.sub.1 -C.sub.4 alkyl and R.sub.12 is the same as R.sub.11, or R.sub.11 and R.sub.12 together form cyclopentane or cyclohexane, and R.sub.13 is: (a) phenyl substituted 1 to 5 times with C.sub.3 -C.sub.7 secondary alkyl or C.sub.4 -C.sub.7 tertiary alkyl, or (b) selected from the group consisting of naphthyl, anthryl, and phenanthryl optionally substituted 1 to 5 times with C.sub.3 -C.sub.7 secondary alkyl or C.sub.4 -C.sub.7 tertiary alkyl groups, R.sub.10 is C.sub.6 -C.sub.10 alkyl, aryl or alkyl aryl, and Y is H, F or Cl, are disclosed. These processes can be used to make optically enhanced and optically pure forms of the compounds, which are useful in the making of camptothecin and analogs thereof.
different kinds of metals and their coordination sites. Metals coordinating to the bpy N2 units of the triangular ligands are assembled in the cavity with their labile coordination sites directed inward. Meanwhile, the metals at the salen/saloph N2O2 units have axialcoordination sites that are vertically pointing out of the triangle. As a result, planar homo- and heterohexanuclear complexes with different
在其附近具有多种金属的配合物可发挥有用的功能,例如多价捕获和催化活性。然而,通常难以挑战的是以规则的距离布置多种金属并保持反应性配位点。现在,我们已经设计并合成了有机大环配体bpytrisalen和bpytrisaloph,作为在空间上排列各种金属及其配位点的平台。配位到三角形配体的bpy N 2单元的金属在空腔中组装,其不稳定的配位点向内。同时,salen / saloph N 2 O 2中的金属单元的轴向配位点垂直指向三角形。结果,获得了具有不同种类配位点的平面同核和异六核配合物。此外,在将双位连接体配体与salen单元的轴向配位点配位后,选择性地构建了双层结构,这显示了在bpy和salen单元上配位点的正交性。在追求多核配合物的应用中,金属中心及其配位点的阵列的一致性,而与元素无关,这是一个合乎需要的特征。
Camptothecin intermediate and method of making camptothecin intermediates
申请人:North Carolina State University
公开号:US05191082A1
公开(公告)日:1993-03-02
Compounds of Formula I ##STR1## are made in accordance with the following scheme: ##STR2## wherein R may be loweralkyl; R.sub.1 may be H, loweralkyl, loweralkoxy, or halo; R.sub.2, R.sub.3, R.sub.4, and R.sub.5 may each independently be H, amino, hydroxy, loweralkyl, loweralkoxy, loweralkylthio, di(loweralkyl)amino, cyano, methylenedioxy, formyl, nitro, halo, trifluoromethyl, aminomethyl, azido, amido, hydrazino, or any of the twenty standard amino acids bonded to the A ring via the amino-nitrogen atom; Y is H and W and X are halogen. Also disclosed are novel processes for making starting materials for the scheme given above, and novel intermediates employed in these processes.