Visible-Light-Promoted Selenocyanation of Cyclobutanone Oxime Esters Using Potassium Selenocyanate
作者:Xia Zhao、Liangshuo Ji、Yu Gao、Tengteng Sun、Jiamin Qiao、Ankun Li、Kui Lu
DOI:10.1021/acs.joc.1c00893
日期:2021.9.3
We report the visible-light-promoted selenocyanation of cyclobutanone oxime esters using potassiumselenocyanate in the presence of a fac-Ir(ppy)3 catalyst for the first time. Because of the mild conditions employed and use of readily accessible potassiumselenocyanate, this method is an effective and green strategy for the synthesis of cyano and selenocyano bifunctional substituted alkanes.
A rhodium(<scp>i</scp>)-catalysed formal intramolecular C–C/C–H bond metathesis
作者:Takanori Matsuda、Itaru Yuihara
DOI:10.1039/c5cc01415h
日期:——
The rhodium-catalyzed phenylcyclobutane-to-indane transformation proceeds via consecutive chelation-assisted C-C bond cleavage and intramolecular C-H bond cleavage.
KO<i>t</i>Bu-promoted Michael/aldol/ring-opening cascade reaction of cyclobutanones with chalcones
作者:Biao Wang、Han Zhong、Xu Tian
DOI:10.1039/d2cc03007a
日期:——
An efficient Michael/aldol/ring-opening cascade reaction of cyclobutanones with chalcones has been developed. This protocol employs inexpensive potassium tert-butoxide (KOtBu) as a promoter and enables an efficient synthesis of densely substituted cyclohex-3-ene-carboxylic acids in high yields with high diastereoselectivities, which are difficult to prepare through conventional approaches. The significant
已经开发了环丁酮与查耳酮的有效迈克尔/醛醇/开环级联反应。该协议采用廉价的叔丁醇钾 (KO t Bu) 作为促进剂,并能够以高产率有效合成密集取代的 cyclohex-3-ene-羧酸,具有高非对映选择性,这是通过传统方法难以制备的。该方法的显着优势包括无过渡金属条件、容易获得的起始材料、广泛的范围和高原子经济性。
Copper-catalyzed thiocyanation of cyclobutanone oxime esters using ammonium thiocyanate
作者:Xia Zhao、Tengteng Sun、Wenxin Gu、Jingwen Qin、Kui Lu、Fei Ye
DOI:10.1039/d3ob01898a
日期:——
copper-catalyzed thiocyanation of cycloketone oxime esters with ammonium thiocyanate has been developed for the first time. This innovative approach allows access to cyano and thiocyano bifunctionally substituted alkanes, which can be further transformed into their respective trifluoromethylthiol-substituted or difluoromethylthiol-substituted alkylnitriles, alkynyl sulfides, and phosphorothioate esters. The readily