Synthesis of Aldehydes by Organocatalytic Formylation Reactions of Boronic Acids with Glyoxylic Acid
作者:He Huang、Chenguang Yu、Xiangmin Li、Yongqiang Zhang、Yueteng Zhang、Xiaobei Chen、Patrick S. Mariano、Hexin Xie、Wei Wang
DOI:10.1002/anie.201703127
日期:2017.7.3
Reported herein is a conceptually novel organocatalytic strategy for the formylation of boronic acids. New reactivity is engineered into the α‐amino‐acid‐forming Petasis reaction occurring between aryl boronic acids, amines, and glyoxylic acids to prepare aldehydes. The operational simplicity of the process and its ability to generate structurally diverse and valued aryl, heteroaryl, and α,β‐unsaturated
been developed. Readily available alkenylboronic acids serve as alkenylation reagents, leading to densely functionalized pyrrolines. Both (E)‐ and (Z)‐cinnamylpyrrolines are accessible depending on the reaction solvent. In dichloromethane, (E)‐cinnamylpyrrolines are produced through a photoredox‐mediated single‐electron‐transfer process. In tetrahydrofuran, (Z)‐cinnamylpyrrolines are generated by photocatalytic
Mild Base Promoted Nucleophilic Substitution of Unactivated
<i>sp</i>
<sup>3</sup>
‐Carbon Electrophiles with Alkenylboronic Acids
作者:Shiwen Liu、Xiaojun Zeng、Gerald B. Hammond、Bo Xu
DOI:10.1002/adsc.201800826
日期:2018.10.4
Diverse alkenylboronic acids react smoothly with various sp3‐carbon electrophiles such as unactivated alkyl triflates in the presence of mild bases such as K3PO4. The reaction protocol is very mild and thereby enables high functional group tolerance. This transition metal‐free condition is orthogonal towards the classic transition metal catalyzed Suzuki coupling.
在温和的碱(例如K 3 PO 4)存在下,不同的烯基硼酸与各种sp 3-碳亲电试剂(例如未活化的烷基三氟甲磺酸酯)平滑反应。反应方案非常温和,因此可以实现较高的官能团耐受性。这种无过渡金属的条件与经典的过渡金属催化的Suzuki偶联正交。
Cinnamamide compounds as metabotropic glutamate receptor antagonists
申请人:Edwards Louise
公开号:US20070049578A1
公开(公告)日:2007-03-01
The invention relates to compounds of formula I or pharmaceutically acceptable salts or solvates thereof:
where R
1
, R
2
, R
3
, A, X, and n are defined in the description. The invention also includes pharmaceutical compositions and uses of, and processes of making the compounds, as well as methods of medical treatment of mGluR 5 mediated disorders.
Photoredox-Catalyzed Intermolecular Remote C–H and C–C Vinylation via Iminyl Radicals
作者:Xu Shen、Jia-Jia Zhao、Shouyun Yu
DOI:10.1021/acs.orglett.8b02540
日期:2018.9.7
C(sp3)–H and C–C vinylation of O-acyl oximes with vinyl boronic acids has been achieved. This strategy is enabled by photoreductive generation of iminyl radicals from O-acyl oximes under irradiation by visible light. The translocated carbon-centered radicals, which are generated from the iminyl radicals through 1,5-hydrogen atom transfer or C–C cleavage, can be vinylated with vinyl boronic acids. This