Novel 1,3-dipolar cycloadditions of fulvenes and hydrazonyl chlorides: a facile synthesis of the cyclopenta[d]pyridazines
作者:Kang Jin Lee、Joong-Kwon Choi、Eul Kgun Yum、Sung Yun Cho
DOI:10.1016/j.tetlet.2009.09.086
日期:2009.12
A simple and convenient route for one-pot synthesis of cyclopenta[d]pyridazine through 1,3-dipolar cycloaddition of fulvenes and hydrazonyl chlorides is described. The reaction of fulvenes with hydrazonyl chlorides in the presence of silver carbonate smoothly afforded a series of cyclopenta[d]pyridazines.
描述了一种简单方便的途径,可通过富烯类化合物和肼基氯的1,3-偶极环加成反应一锅合成环戊[ d ]哒嗪。在碳酸银的存在下,富烯类化合物与肼酰氯的反应平稳地产生了一系列环戊[ d ]哒嗪。
Synthese von 1H-[1]Benzothieno[3,2—c]pyrazol-Derivaten
作者:F. Sauter、G. Büyük、U. Jordis
DOI:10.1007/bf00912987
日期:1974.7
[3 + 2] Cycloaddition of Nitrile Imines with Enamides: An Approach to Functionalized Pyrazolines and Pyrazoles
作者:Liang Tu、Limei Gao、Xiaomeng Wang、Ruijie Shi、Rupei Ma、Junfei Li、Xiaoshuang Lan、Yongsheng Zheng、Jikai Liu
DOI:10.1021/acs.joc.0c02244
日期:2021.1.1
with enamides has been established. A wide range of functionalized pyrazoline derivatives (53 examples) were obtained in moderate to good yields (up to 96%) under very mild conditions. This protocol features broad substrate scope, good functional group tolerance, and operational simplicity. Practical transformation of the products into useful pyrazoles via a one-pot process and the scalability of this