Method of polynucleotide synthesis using modified support
申请人:Agilent Technologies Inc
公开号:EP1510522A1
公开(公告)日:2005-03-02
Methods for polynucleotide synthesis using modified support materials typically involve concurrent oxidation and deprotection reactions. Upon synthesis of a desired polynucleotide, the completed polynucleotide may be released from the modified support materials.
Methods of forming an internucleotide bond are disclosed. Such methods find use in synthesis of polynucleotides. The method involves contacting a functionalized support with a precursor having an exocyclic amine triaryl methyl protecting group under conditions and for a time sufficient to result in internucleotide bond formation. The functionalized support includes a solid support, a triaryl methyl linker group, and a nucleoside moiety having a reactive site hydroxyl, the nucleoside moiety attached to the solid support via the triaryl methyl linker group.
Primary activation of <i>para</i>-quinone methides by chiral phosphoric acid for enantioselective construction of tetraarylmethanes
作者:Zhengyu Han、Biao Zhu、Yu Zang、Chaoshen Zhang、Xiu-Qin Dong、Hai Huang、Jianwei Sun
DOI:10.1039/d3sc05014a
日期:——
an effective hydrogen bond donor unit (e.g., OH, NH), here no such unit is required in the nucleophile. N-protected indole nucleophiles were successfully utilized for the synthesis of chiral tetraarylmethanes with high efficiency and enantioselectivity under mild conditions. Therefore, this protocol significantly expanded the scope of asymmetric transformations of p-QMs.
这里展示的是基于手性磷酸催化系统通过对醌甲基化物 ( p -QM) 的初级活化进行的不对称亲核加成。与之前基于CPA的双功能活化过程都需要亲核体具有有效的氢键供体单元(例如OH、NH)形成鲜明对比,这里亲核体中不需要这样的单元。 N-保护的吲哚亲核试剂成功地用于在温和条件下高效和对映选择性地合成手性四芳基甲烷。因此,该协议显着扩大了p -QM 不对称变换的范围。
MALDI-MS analysis of nucleic acids bound to a surface
申请人:Dellinger J. Douglas
公开号:US20050186579A1
公开(公告)日:2005-08-25
A method of analyzing a polynucleotide using matrix assisted laser desorption/ionization mass spectrometry (MALDI-MS) is described. The method includes obtaining the polynucleotide bound to a substrate via a linker moiety having a triaryl methyl linker group. The polynucleotide bound to the substrate is then contacted with a matrix material and analyzed by MALDI-MS. During the MALDI-MS analysis, laser radiation is directed at the matrix material, thereby exciting the matrix material and causing cleavage of the linker moiety. Ions generated as a result of this excitation and cleavage process are then analyzed to provide information about the polynucleotide.