[(NHC)Au<sup>I</sup>]-Catalyzed Rearrangement of Allylic Acetates
作者:Nicolas Marion、Ronan Gealageas、Steven P. Nolan
DOI:10.1021/ol070843w
日期:2007.7.1
[(NHC)AuCl] complexes (NHC = N-heterocycliccarbene), in conjunction with a silver salt, were found to efficiently catalyze the rearrangement of allylic acetates under both conventional and microwave-assisted heating. The optimization of several reaction parameters (solvent, silver salt, and ligand) as well as a study of the reaction scope are reported. The steric hindrance of the ligand bound to gold was
Ni-Catalyzed Enantioselective Allylic Alkylation of <i>H</i>-Phosphinates
作者:Qing Zhang、Xu-Teng Liu、Yue Wu、Qing-Wei Zhang
DOI:10.1021/acs.orglett.1c02986
日期:2021.11.19
The asymmetric synthesis of P-stereogenic phosphinates through allylicalkylation of H-phosphinates has been developed. With H-phosphinates and allylic acetates as the starting materials, a variety of allylic P-chiral phosphinates were accessed in high enantioselectivities of up to 92% ee and generally high yields. In addition, a further study demonstrated the applicability of this protocol, including
的不对称合成P -stereogenic次膦酸盐通过的烯丙基烷基化ħ -phosphinates已经研制成功。以H-次膦酸盐和烯丙基乙酸酯为起始材料,以高达 92% ee 的高对映选择性和通常高产率获得了多种烯丙基P-手性次膦酸盐。此外,进一步的研究证明了该协议的适用性,包括在温和的反应条件下,使用有机锂试剂将手性产物从次膦酸盐放大合成和轻松转化为氧化膦。
Ni-Catalyzed Asymmetric Allylation of Secondary Phosphine Oxides
A nickel catalyzed asymmetric allylation of secondary phosphineoxides (SPO) for the synthesis of tertiary phosphineoxides (TPO) was realized with high enantioselectivity. The dynamic kinetic resolution of SPO was accomplished in the presence of nickel complex. By elucidating the absolute configurations of the reacted SPO starting material and the TPO product, we confirmed that the allylation reaction
PYRIDONE COMPOUND, AND AGRICULTURAL AND HORTICULTURAL FUNGICIDE HAVING THIS AS ACTIVE COMPONENT
申请人:Mitsui Chemicals Agro, Inc.
公开号:EP3611164A1
公开(公告)日:2020-02-19
Novel compounds controlling plant diseases are provided. Pyridone compounds of the invention are novel and can control plant diseases. The pyridone compounds of the invention encompass compounds of formula (1) and salts thereof.
Hydroxyallylpyridyl derivatives exhibited a peculiar thermal behavior likely ascribed to the weak acidity of the 'picoline-type' hydrogen atom on the C-1 carbon of the allyl residue, leading to allyl inversion products. The unprotected alcohol reacted as 'vinylogous picoline' carbon nucleophilc with strongly activated heterocyclic counterparts. A mechanistic rationale for this unprecedented reactivity was proposed. (C) 2004 Elsevier Ltd. All rights reserved.