Rhodium-Catalyzed Oxidative C-H Activation/Cyclization for the Synthesis of Phosphaisocoumarins and Phosphorous 2-Pyrones
作者:Youngchul Park、Jungmin Seo、Sangjune Park、Eun Jeong Yoo、Phil Ho Lee
DOI:10.1002/chem.201302652
日期:2013.11.25
Rhodium‐catalyzed cyclization of phosphinic acids and phosphonic monoesters with alkynes has been developed. The oxidative annulation proceeds with complete conversion of phosphinic acid derivatives and allowed the atom‐economic preparation of useful phosphaisocoumarins with high yield and selectivity. The reaction is tolerant of extensive substitution on the phosphinic acid, phosphonic monoester and alkyne, including
NOVEL PHOSPHININE OXIDE DERIVATIVE AND PREPARATION METHOD THEREOF
申请人:KNU-INDUSTRY COOPERATION FOUNDATION
公开号:US20150344506A1
公开(公告)日:2015-12-03
Provided are a novel phosphinine oxide derivative and a preparation method thereof, and more specifically, the phosphinine oxide derivative includes an oxaphosphinine oxide derivative and an azaphosphinine oxide derivative.
The phosphinine oxide derivative according to the present invention may have a pharmacological activity and a physiological activity, and may be used as a basic framework of a natural product and may be used for development of new drug and synthesis of various medical supplies.
In addition, according to the preparation method of the phosphinine oxide derivative according to the present invention, various phosphinine oxide derivatives with a high yield may be prepared by a simple synthesis process using an intramolecular annulation between a phosphinic derivative and an alkyne derivative in the presence of a rhodium (Rh) catalyst or a ruthenium (Ru) catalyst and an oxidant.
A novel visible-light photoredox-catalyzed phosphinyloxy radical addition/cyclization cascade of arylphosphinic acids or arylphosphonic acidmonoesters with alkynes has been developed, which provides an efficient and practical access to various phosphaisocoumarins by using a dual catalytic system containing an acridinium photosensitizer and a cobaloxime proton-reducing catalyst [Co(dmgH)2]PyCl at ambient
Pd(II)-Catalyzed Enantioselective Synthesis of P-Stereogenic Phosphinamides via Desymmetric C–H Arylation
作者:Zhi-Jun Du、Jing Guan、Guo-Jie Wu、Peng Xu、Lian-Xun Gao、Fu-She Han
DOI:10.1021/ja512029x
日期:2015.1.21
We present the enantioselectivesynthesis of P-stereogenic phosphinamides through Pd-catalyzed desymmetric ortho C-H arylation of diarylphosphinamides with boronic esters. The method represents the first example of the synthesis of P-stereogenic phosphorus compounds via the desymmetric C-H functionalization strategy. The reaction proceeded efficiently with a wide array of reaction partners to afford
我们提出了通过 Pd 催化的二芳基膦酰胺与硼酸酯的去对称邻 CH 芳基化对 P-立体异构膦酰胺的对映选择性合成。该方法代表了通过去对称 CH 功能化策略合成 P-立体磷化合物的第一个例子。该反应与各种反应伙伴一起有效进行,以高达 74% 的产率和 98% 的 ee 提供 P-立体膦酰胺。通过克规模合成进一步证明了效率。此外,还详细阐述了 P-立体磷酰胺向各种类型的 P-立体磷衍生物的灵活转化。因此,该协议为 P 立体化合物的高效和通用合成提供了一种新工具。