Absolute Configuration of Small Molecules by Co‐Crystallization
作者:Felix Krupp、Wolfgang Frey、Clemens Richert
DOI:10.1002/ange.202004992
日期:2020.9.7
reliable method to determine the absoluteconfiguration of chiral molecules is X‐ray crystallography, but smallmolecules can be difficult to crystallize. We report rapid co‐crystallization of tetraaryladamantanes with smallmolecules as different as n‐decane to nicotine to produce crystals for X‐ray analysis and the assignment of absoluteconfiguration when the molecules are chiral. A screen of 52 diverse
摘要确定手性分子绝对构型的最可靠方法是 X 射线晶体学,但小分子可能难以结晶。我们报道了四芳基金刚烷与不同小分子的快速共结晶n‐癸烷转化为尼古丁,生成用于 X 射线分析的晶体,并在分子为手性时指定绝对构型。对 52 种不同化合物的筛选显示 88% 的情况包含在共晶中,77% 的情况显示高分辨率结构。此外,从三毫克分析物开始,核磁共振波谱和 X 射线晶体学相结合,使用金刚烷结晶伴侣在室温下封装分析物,在不到三天的时间内产生了完整的结构。
RigidC3-Symmetric Scaffolds Based on Adamantane
作者:Nadine Pannier、Wolfgang Maison
DOI:10.1002/ejoc.200701003
日期:2008.3
Efficient syntheses of rigid C3-symmetric scaffoldsbased on adamantane are described. The scaffolds are available in multigram quantities and have been designed for conjugation to various natural products such as carbohydrates and peptides. They are thus valuable for the construction of strictly defined molecular architectures with threefoldgeometry for applications in bioorganic chemistry, catalysis
Novel halogen-free flame retardants based on adamantane for polycarbonate
作者:Shu-Qin Fu、Jian-Wei Guo、Dong-Yu Zhu、Zhe Yang、Chu-Fen Yang、Jia-Xing Xian、Xiong Li
DOI:10.1039/c5ra10887j
日期:——
series of flame retardants (FRs) containing phosphate moieties attached to a bridgehead-substituted adamantane, 1-(diphenyl phosphate) adamantane (DPAd), 1,3-bis(diphenyl phosphate) adamantane (BDPAd), 1,3,5-tris(diphenyl phosphate) adamantane (TDPAd) and 1,3,5,7-tetrakis(diphenyl phosphate) adamantane (TKDPAd), were systematically synthesized in an attempt to develop efficient FRs for polycarbonate
A process produces vinyl ether compounds and includes allowing a vinyl ester compound represented by following Formula (1):
1
wherein R
1
, R
2
, R
3
and R
4
are the same or different and are each a hydrogen atom or an organic group, to react with a hydroxy compound represented by following Formula (2):
R
5
OH (2)
wherein R
5
is an organic group, in the presence of at least one transition element compound to thereby yield a vinyl ether compound represented by following Formula (3):
2
wherein R
2
, R
3
, R
4
and R
5
have the same meanings as defined above. Such transition element compounds include iridium compounds and other compounds containing Group VIII elements.
ADAMANTYL (METH)ACRYLIC MONOMER AND (METH)ACRYLIC POLYMER CONTAINING THE SAME AS REPEATING UNIT
申请人:Furukawa Kikuo
公开号:US20130023638A1
公开(公告)日:2013-01-24
Provided according to the present invention are an adamantyl (meth)acrylate represented by formula (1), having a formazin standard turbidity of less than 1.7 NTU (Nephelometric Turbidity Unit) in methylethylketone or tetrahydrofuran, and also a (meth)acrylic copolymer comprising the adamantyl (meth)acrylate as a repeating unit:
(in the formula, R1 represents hydrogen or a methyl group; R2 through R4 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having a carbon number of 1 to 3, an aryl group, an alkoxy group, an aryloxy group, a halogen group, an alkyl halide group, or a hydroxyalkyl group; and n1 represents 0 or 1).