Iron-Catalyzed Ring Expansion of Cyclobutanols for the Synthesis of 1-Pyrrolines by Using MsONH<sub>3</sub>OTf
作者:Daijiao Zhuang、Tharcisse Gatera、Zhenyu An、Rulong Yan
DOI:10.1021/acs.orglett.1c04304
日期:2022.1.21
The synthesis of 1-pyrrolinesfrom cyclobutanol derivatives and an aminating reagent (MsONH3OTf) has been developed. This one-pot procedure achieves C–N bond/C═N bond formation via ring expansion. A series of 1-pyrroline derivatives are synthesized in moderate to good yields under mild conditions.
An iodine‐mediated oxidative ring contraction of cyclobutanols has been developed. The reaction allows the synthesis of a wide range of aryl cyclopropyl ketones under mild and eco‐friendly conditions. A variety of functional groups including aromatic or alkyl halides, ethers, esters, ketones, alkenes, and even aldehydes are nicely tolerated in the reaction. This is in contrast with traditional synthetic
TFA‐Catalyzed [3+2] Spiroannulation of Cyclobutanols: A Route to Spiro[cyclobuta[
<i>a</i>
]indene‐7,1′‐cyclobutane] Skeletons
作者:Zhenyu An、Yafeng Liu、Yanwei Sun、Rulong Yan
DOI:10.1002/asia.202001048
日期:2020.11.16
A straightforward method for the synthesis of spiro[cyclobuta[a]indene‐7,1′‐cyclobutane] derivatives from cyclobutanols has been developed viaone‐pot [3+2] spiroannulation. A series of new spiro[cyclobuta[a]indene‐7,1′‐cyclobutane] derivatives are facilely synthesized in good yields under mildreaction conditions.
一种通过单锅[3 + 2]螺环合成法开发了一种从环丁醇合成螺[cyclobuta [ a ] indene-7,1'-cyclobutane]衍生物的简单方法。在温和的反应条件下,以高收率容易地合成了一系列新的螺[cyclobuta [ a ] indene-7,1'-cyclobutane]衍生物。
Manganese-catalyzed ring-opening carbonylation of cyclobutanol derivatives
作者:Tim Meyer、Zhiping Yin、Xiao-Feng Wu
DOI:10.1016/j.tetlet.2019.02.028
日期:2019.3
Herein, we report a manganese-catalyzed ring-opening carbonylation of cyclobutanol derivatives through cyclic CC bond cleavage. The reaction happens via a radical-mediated pathway to selectively generate 1,5-ketoesters. A variety of substrates with substituents on the aromatic ring reacted with linear alcohols of different chain lengths. Obtained aliphatic esters are very attractive since they are
nickel-catalyzed cine-arylation of tert-cyclobutanols with indoles to access β-aryl ketones with an unusual site-selectivity at the C3-position of tert-cyclobutanols. The reaction features earth-abundant nickelcatalysis, excellent regioselectivity, high atom-economy, and broad substrate scope.