Transition Metal-Free Synthesis of 3-Alkynylpyrrole-2-carboxylates<i>via</i>Michael Addition/Intramolecular Cyclodehydration
作者:Qing-hu Teng、Yan-li Xu、Ying Liang、Heng-shan Wang、Ying-chun Wang、Ying-ming Pan
DOI:10.1002/adsc.201501073
日期:2016.6.16
the synthesis of 3‐alkynylpyrrole‐2‐carboxylates from diynones and glycine esters or 2‐aminoacetophenone hydrochloride has been developed. This transformation provides a large range of substituted pyrroles in good to excellent yields with the elimination of water as the only by‐product. The detailed mechanistic studies elucidated that this transformation involves a Michaeladdition/intramolecular cyclodehydration
NOVEL DEORDORISING COMPOSITIONS AND DEODORISING PRODUCTS CONTAINING SAME
申请人:Casazza André
公开号:US20120201778A1
公开(公告)日:2012-08-09
The invention relates to novel deodorant compositions containing at least one compound of the family of acetylenic ketones and the deodorant products containing them. A particularly preferred composition according to the invention comprises at least one compound of the family of the α-acetylenic ketones and a mixture of aldehydes chosen from two different families.
Stereoselective synthesis of conjugated polyenones from diynones
作者:Cheng Guo、Xiyan Lu
DOI:10.1016/0040-4039(91)80531-a
日期:1991.12
(E,E,E,E) -Tetraenones were stereoselectively synthesized via isomerization of diynones catalyzed by palladium or iridium complexes. (E,E,Z) -Trienones were stereoselectively prepared via isomerization of diynones catalyzed by ruthenium complexes followed by Lindlar hydrogenation.
Sequential [3+2] and [4+4] Annulation of Diynone and <i>o</i>‐Hydroxyaryl Azomethine Ylide: Construction of Dihydropyrrole Fused Eight‐Membered Ring Scaffold
作者:Jie Shen、Yu Xing、Lidong Fu、Yanze Li、Lei Cui、Zijun Zhou、Chunju Li、Jian Li
DOI:10.1002/adsc.202300998
日期:2023.12.5
We developed a cascade reaction of diynone and o-hydroxy aromatic aldimine under mild conditions. This protocol is proposed to proceed through sequential [3+2]/[4+4] cycloaddition and proton transfer processes, thus providing an efficient way for the synthesis of a variety of dihydropyrrole fused eight-membered ring scaffolds.