Tertiary Amine-Triggered Cascade S<sub>N</sub>2/Cycloaddition: An Efficient Construction of Complex Azaheterocycles under Mild Conditions
作者:Jian Hu、Bing Tian、Xinyan Wu、Xiaofeng Tong
DOI:10.1021/ol302329b
日期:2012.10.5
In this paper, an amine-triggeredcascade SN2/cycloaddtion sequence between 2-(acetoxymethyl)buta-2,3-dienoate 1 and various π-system functionalized tosylamides 3 has been reported, which provides a facile method for stereoselective construction of structurally diverse azaheterocycles.
在本文中,已经报道了在2-(乙酰氧基甲基)丁2,3-二烯酸酯1和各种π-系统官能化的甲苯磺酰胺3之间的胺触发级联S N 2 /环加成序列,为立体选择性构建Sn 2提供了一种简便的方法。结构上不同的氮杂杂环。
HOTf-Catalyzed Rearrangement of Methylenecyclopropane Aryl and Alkyl Alcohols
作者:Xiang-Ying Tang、Min Shi
DOI:10.1002/ejoc.201000509
日期:2010.7
An efficient method to synthesize multisubstituted naphthalene and cyclobutanol derivatives through ring opening/ring enlargement of readily available methylenecyclopropane diaryl alcohols or dialkyl- and monoalkyl- as well as monoaryl alcohols in moderate to good yields has been described in this paper. The formation of naphthalene derivatives is a sequential reaction involving a cation-induced ring
4,4‐Difluorospiro[2.2]pentan‐1‐yl – A Fluorinated Substituent To Expand the Synthetic and Medicinal Chemists’ Toolbox
作者:Kostiantyn P. Melnykov、Olena V. Voloshyna、Bohdan V. Vashchenko、Oleksandr P. Demchuk、Oleksandr V. Hryshchuk、Oleksandr O. Grygorenko
DOI:10.1002/ejoc.202200863
日期:2022.10.26
Scalable and diastereoselective synthetic approach to 4,4-difluorospiro[2.2]pentan-1-yl derivatives by the difluorocyclopropanation of (2-methylenecyclopropyl)methanol and further chemical modifications were disclosed. Structural features, pKa, logP, and aqueous solubility of the products were established and compared with those of non-fluorinated and 2,2-difluorinated analogs, as well as monocyclic
公开了通过 (2-亚甲基环丙基) 甲醇的二氟环丙烷化和进一步的化学修饰制备 4,4-二氟螺[2.2]戊-1-基衍生物的可扩展和非对映选择性合成方法。建立了产品的结构特征、p K a、log P和水溶性,并与非氟化和 2,2-二氟化类似物以及单环偕二氟化对应物进行了比较。
Bu<sub>2</sub>SnIH-Promoted Proximal Bond Cleavage of Methylenecyclopropanes and Successive Radical Cyclization and/or Pd-Catalyzed Coupling Reaction
作者:Naoki Hayashi、Yusuke Hirokawa、Ikuya Shibata、Makoto Yasuda、Akio Baba
DOI:10.1021/ja7103729
日期:2008.3.1
The unprecedented regioselective hydrostannation of methylenecyclopropanes to give vinyltins was achieved using dibutyliodotin hydride (Bu2SnIH), which could be applied to intramolecular radical cyclization.
New Convenient Access to Optically Active Methylidenecyclopropylcarbinols
作者:Maurice Le Corre、Alain Hercouet、Bernard Bessieres