Immobilization of thermotolerant intracellular enzymes on functionalized nanoporous activated carbon and application to degradation of an endocrine disruptor: kinetics, isotherm and thermodynamics studies
Screw sense selective polymerization of achiral isocyanides catalyzed by optically active nickel(II) complexes
作者:Paul C. J. Kamer、Roeland J. M. Nolte、Wiendelt. Drenth
DOI:10.1021/ja00228a035
日期:1988.9
screw sense. Therefore, it should be possible to obtain opticallyactive polymers by using chiral catalysts. In the present paper we describe the synthesis of opticallyactivepoly (isocyanides) by using Ni(II) complexes of opticallyactive amines as catalysts.15 The prevailing screw sense of the polymers is derived from CD R N H 2 1 R N H C H O 2 R N +
各种非手性异氰化物与该催化剂的聚合产生光学活性聚合物,其对映体过量高达 83%。在质子酸、路易斯酸或 Ni(II) 盐作为催化剂存在下,异氰化物聚合生成聚(异氰化物),也称为聚(亚氨基亚甲基)或聚(碳酰亚胺酰基)。1,2 Ni(II) 盐是多功能催化剂,在我们看来,最适合我们的实验。聚(异氰化物)是方案 I n Ni(II) ( RN = C < ) 中的不寻常聚合物 „ 其主链的每个原子都带有侧链 .1,2 这一特征导致围绕单键的旋转受限连接主链碳原子。单键周围可能有两种构象,即。R 和 S 。所得聚合物将是具有P和M螺杆的非对映异构分子的混合物。这种混合物将包含过量的一种螺旋感。在大约 20 种不同的光学活性异氰化物 0.10" 12 中观察到了这一点。在另一个过程中,我们通过特异性抑制外消旋对的一个螺旋方向的生长来制备光学活性聚合物。5,13 最后,在一种情况下,光学活性聚合物活性聚
Therapeutic compounds
申请人:——
公开号:US20040102435A1
公开(公告)日:2004-05-27
Compounds of the formula (I) for use as an estrogen receptor-&bgr;-selective ligand are described wherein: X is O or S; and R
1
, R
3
R
6
are as described in the specification. The use of these compounds in treating Alzheimer's disease, anxiety disorders, depressive disorders, osteoporosis, cardiovascular disease, rheumatoid arthritis and prostate cancer is described; as are processes for making them.
Sequential Nitration/Hydrogenation Protocol for the Synthesis of Triaminophloroglucinol: Safe Generation and Use of an Explosive Intermediate under Continuous-Flow Conditions
作者:David Cantillo、Markus Damm、Doris Dallinger、Marcus Bauser、Markus Berger、C. Oliver Kappe
DOI:10.1021/op5001435
日期:2014.11.21
ratio of the utilized capillary tubing. Clogging of the tubing due to precipitation of trinitrophloroglucinol (TNPG) was avoided by immersing the tubular reactor in an ultrasound bath during the process. The nitration mixture was diluted with water and immediately subjected to catalytic hydrogenation of the nitro groups using a commercially available continuous-flow reactor and PtO2 as heterogeneous catalyst
recently discovered that hyaluronan was exported from fibroblasts by MRP5 and from epithelial cells by cystic fibrosis (CF) transmembrane conductance regulator (CFTR) that was known as a chloride channel. On this basis we developed membrane permeable analogs of hyaluronandisaccharide as new class of compounds to modify their efflux. We found substances that activated hyaluronan export from human breast
Compounds of the formula (I)
for use as an estrogen receptor -β-selective ligand are described wherein:
X is O or S; and R
1
, R
3
-R
6
are as described in the specification. The use of these compounds in treating Alzheimer's disease, anxiety disorders, depressive disorders, osteoporosis, cardiovascular disease, rheumatoid arthritis and prostate cancer is described; as are processes for making them.