1-AMINO-PHTHALAZINE DERIVATIVES, THE PREPARATION AND THE THERAPEUTIC USE THEREOF
申请人:Augereau Michel Jean
公开号:US20070099895A1
公开(公告)日:2007-05-03
A 1-amino-phthalazine derivative of general formula (I)
wherein the substituents are as defined herein. Also disclosed are a method for preparing such compounds, intermediates for use in such method and medical treatments using the compounds of formula (I).
REAGENTS AND METHODS FOR REPLICATION, TRANSCRIPTION, AND TRANSLATION IN SEMI-SYNTHETIC ORGANISMS
申请人:The Scripps Research Institute
公开号:US20200392550A1
公开(公告)日:2020-12-17
Disclosed herein are compositions, methods, cells, engineered microorganisms, and kits for increasing the production of proteins or polypeptides comprising one or more unnatural amino acids. Further provided are compositions, cells, engineered microorganisms, and kits for increasing the retention of unnatural nucleic acids encoding the unnatural amino acids in an engineered cell, or semi-synthetic organism.
yields and enantioselective ratios (up to 99% yield and 96:4 er). The [Fe((Ra)-BINSate)]+ catalyst was designed as a chiral version of FeCl3 with multicoordination sites available for binding the two coupling partners 1 and 2 as well as the oxidant. Our structure–selectivity and activity study, which covered most of the important positions in the NOBIN scaffold, revealed the effect of different substitution
报道了一种用于不对称催化的新型手性氧化还原二磺酸铁络合物。[Fe(( R a )-BINSate)] + (BINSate = 1,1'-binaphthalene-2,2'-disulfonate) 配合物有效促进 2-萘酚 ( 1 ) 和 2-氨基萘之间的对映选择性氧化交叉偶联衍生物 ( 2 ),提供光学富集的 ( R a )-2-amino-2'-hydroxy-1,1'-binaphthyls (NOBINs),具有出色的产率和对映选择性比(高达 99% 的产率和 96:4 er)。[Fe(( Ra ) -BINSate )] +催化剂被设计为 FeCl 3的手性形式具有可用于结合两个偶联配偶体1和2以及氧化剂的多配位点。我们的结构选择性和活性研究涵盖了 NOBIN 支架中的大部分重要位置,揭示了不同取代模式对偶联效率和立体选择性的影响。
PHOSPHOROUS PROTECTING GROUPS AND METHODS OF PREPARATION AND USE THEREOF
申请人:Agilent Technologies, Inc.
公开号:US20150315227A1
公开(公告)日:2015-11-05
Aspects of the present disclosure include compositions that make use of phosphorus and/or nucleobase protecting groups which find use in the synthesis of long polynucleotides. Phosphorus protecting groups are provided that help increase the stepwise coupling yield and/or phosphorous protecting groups that can be removed during the oxidation step. Amidine nucleobase protecting groups are provided that find use in the subject compositions and methods which provides for e.g., increased resistance to depurination during polynucleotide synthesis. In some instances, the methods and compositions disclosed herein utilize a combination of the phosphorus and amidine nucleobase protecting groups in the synthesis of polynucleotides having a sequence of 200 or more monomeric units in length. Also provided are methods for synthesizing a polynucleotide (e.g., a DNA) using one or more compounds disclosed herein.
Development of ProPhenol/Ti(IV) Catalyst for Asymmetric Hydroxylative Dearomatization of Naphthols
作者:Lutao Bai、Linqing Wang、Haiyong Zhu、Shiming Pang、Shixin Li、Jiaming Lv、Hailong Zhang、Dongxu Yang
DOI:10.1021/acs.orglett.3c00077
日期:2023.2.10
By development of ProPhenol/Ti(IV) catalysts, a catalytic enantioselective hydroxylativedearomatization of naphthols is achieved by using TBHP as a simple oxidative reagent. The side coordinative chain equipped on the C1-position of β-naphthols plays an important role for initiating this asymmetric hydroxylative reaction, which might be a result of the proper cocoordination effects to the titanium