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。
Visible-Light-Mediated Ring-Opening Strategy for the Regiospecific Allylation/Formylation of Cycloalkanols
practical access for the modification of complex natural products. Preliminary mechanistic studies demonstrate that the key O-centered radicals mediate the sequential ring cleavage and allylation/formylation.
Synthesis of remote fluoroalkenyl ketones by photo-induced ring-opening addition of cyclic alkoxy radicals to fluorinated alkenes
作者:Donghua Du、Han Peng、Ling He、Shunpeng Bai、Zhenghua Li、Huailong Teng
DOI:10.1039/d2ob01533a
日期:——
In this work, we report a photocatalytic ring-opening addition of cyclic alcohols to α-(trifluoromethyl)styrenes, which underwent a proton-coupled electron transfer and β-scission process, delivering a great variety of remote gem-difluoroalkenyl ketone derivatives. This methodology can also be applied in the reaction of gem-difluorostyrenes and 1,1,2-trifluorostyrenes to access monofluoro- and 1,2-difluoroalkenyl