Preparation of 3,5-Disubstituted Pyrazoles and Isoxazoles from Terminal Alkynes, Aldehydes, Hydrazines, and Hydroxylamine
作者:Ryo Harigae、Katsuhiko Moriyama、Hideo Togo
DOI:10.1021/jo4027116
日期:2014.3.7
provided the corresponding 3,5-disubstituted pyrazoles or isoxazoles in good yields with high regioselectivity, through the formations of propargyl secondary alkoxides and α-alkynyl ketones. The present reactions are one-pot preparation of 3,5-disubstituted pyrazoles from terminal alkynes, aldehydes, molecular iodine, and hydrazines, and 3,5-disubstitutedisoxazolesfrom terminal alkynes, aldehydes
Über eine neue Synthese zur darstellung heterocyclisch substituierter Stilbenverbindungen, die Anil-Sythese
作者:A. E. Siegrist
DOI:10.1002/hlca.19670500318
日期:1967.4.20
Heterocyclische Ringsysteme aromatischen Charakters mit mindestens einem Ring-Stickstoffatom, die eine oder mehrere p-Tolylgruppen oder in einem an den Heterocyclus ankondensierten Benzolring eine Methylgruppe in p-Stellung zu einer CN-oder NC-Gruppe des Heterocyclus enthalten, können in Dimethylformamid in Gegenwart von Kaliumhydroxid oder Kalium-t-butylat mit aromatischen Aldehydanilen zu heterocyclisch
The titled compounds (3) were synthesized by the reaction of nitrile oxides with 1-azirines and also the reaction of aliphatic nitro compounds with dibenzoylmethane derivatives in the presence of acetyl chloride and sodium methoxide. The structure of 3 was established by single crystal X-ray analysis. A mechanism of the formation for 3 is proposed.
在乙酰氯和甲醇钠存在下,通过腈氧化物与 1-氮丙啶的反应,以及脂肪族硝基化合物与二苯甲酰基甲烷衍生物的反应,合成了标题化合物 (3)。通过单晶 X 射线分析确定了 3 的结构。提出了 3 的形成机理。
METHOD FOR ACYLATING A CYCLIC PEPTIDE
申请人:DSM Sinochem Pharmaceuticals Netherlands B.V.
公开号:US20170327540A1
公开(公告)日:2017-11-16
The present invention relates to a process for acylating cyclic peptides bearing an amino group and to the application of said process in the preparation of anidulafungin and micafungin.
Synthesis of Stable N–H Imines with a Benzo[7,8]indolizine Core and Benzo[7,8]indolizino[1,2-<i>c</i>]quinolines via Copper-Catalyzed Annulation of α,β-Unsaturated <i>O</i>-Acyl Ketoximes with Isoquinolinium <i>N</i>-Ylides
作者:Chun-Bao Miao、Xiao-Qi Qiang、Xiaoli Xu、Xiao-Qing Song、Su-Qing Zhou、Xinyu Lyu、Hai-Tao Yang
DOI:10.1021/acs.orglett.2c01386
日期:2022.6.3
A copper-catalyzed annulation of α,β-unsaturated O-acyl ketoximes with isoquinolinium N-ylides has been developed for the concise synthesis of stable N–H imines with a benzo[7,8]indolizine core. When β-(2-bromoaryl)-α,β-unsaturated O-acyl ketoximes are used as the starting materials, a cascade cyclization occurs to afford the benzo[7,8]indolizino[1,2-c]quinolines.
已经开发了一种铜催化的α,β-不饱和O-酰基酮肟与异喹啉N-叶立德的环化反应,用于简明地合成具有苯并 [7,8] 中氮茚核的稳定 N-H 亚胺。当β-(2-溴芳基) -α,β-不饱和O-酰基酮肟作为起始原料时,发生级联环化反应得到苯并[7,8]中氮茚基[1,2- c ]喹啉。