Intramolecular Parallel [4+3] Cycloadditions of Cyclopropane 1,1-Diesters with [3]Dendralenes: Efficient Construction of [5.3.0]Decane and Corresponding Polycyclic Skeletons
作者:Chi Zhang、Jun Tian、Jun Ren、Zhongwen Wang
DOI:10.1002/chem.201605190
日期:2017.1.26
developed [4+3]IMPC (intramolecular parallel cycloaddition) of cyclopropane 1,1‐diesters with [3]dendralenes. With a combination of the [4+3]IMPC and subsequent [4+n] cycloadditions, trans‐[5.3.0]decane skeleton and its corresponding structurally complex and diverse polycyclic variants could be constructed efficiently. This novel [4+3] cycloadditionreaction mode of donor–acceptorcyclopropanes proceeds
Cooperative Photo-/Lewis Acid Catalyzed Tandem Intramolecular [3 + 2] Cross-Cycloadditions of Cyclopropane 1,1-Diesters with α,β-Unsaturated Carbonyls for Medium-Sized Carbocycles
作者:Zhenjun Wang、Shuai Chen、Jun Ren、Zhongwen Wang
DOI:10.1021/acs.orglett.5b01928
日期:2015.9.4
A tandemisomerization/intramolecular [3 + 2] cross-cycloaddition (IMCC) of cyclopropane 1,1-diesters with α,β-unsaturated ketones/aldehydes under a cooperativecatalysis of photo and Lewis acids has been successfully developed. This supplied a general and efficient strategy for construction of medium-sized carbocyclic (8-, 9-, and 10-membered) skeletons as well as such carbocycle-based bridged oxa-bicyclo[n
已成功开发了在光和路易斯酸的协同催化下,具有α,β-不饱和酮/醛的环丙烷1,1-二酯的串联异构化/分子内[3 + 2]交叉环加成(IMCC)。这为构建中等碳环(8、9和10元)骨架以及此类基于碳环的桥接氧杂双环[ n .2.1](n = 4–6)提供了一种通用而有效的策略。骨骼。
Synthesis of Chiral Aza‐[n.2.1] Skeletons by Separable Epimers of Intramolecular [3+2] Cross Cycloaddition of Cyclopropane 1,1‐Diesters with Chiral Sulfinylimines
作者:Miao‐Miao Xia、Feng‐Xing Li、You‐Ping Ma、Le‐Le Song、Yan‐Ni Hou、Zi‐Fa Shi、Xiao‐Ping Cao
DOI:10.1002/adsc.201901543
日期:2020.3.4
Reported herein is the construction of chiral aza‐[n.2.1] skeletons by separable epimers of intramolecular [3+2] cross cycloaddition of cyclopropane 1,1‐diesters with chiral sulfinylimines. The epimer products can be separated by silica gel column chromatography.
Construction of Fused‐oxa‐[n.2.1] Skeletons by Tandem Intramolecular [3+2] Cycloaddition/O‐H Insertion/Ester Exchange of Cyclopropanes with Diazocarbonyls
作者:Miao‐Miao Xia、Le‐Le Song、Feng‐Xing Li、Yan‐Ni Hou、Zi‐Fa Shi、Xiao‐Ping Cao
DOI:10.1002/adsc.201901214
日期:2020.2.6
A Lewis acid promoted tandem reaction of intramolecular [3+2] cycloaddition/O−H insertion/ester exchange of cyclopropanes with diazocarbonyls is reported to synthesize fused‐oxa‐[n.2.1] skeletons, which tolerates both aryl and alkyl diazocarbonyl substrates. A wide variety of fused‐oxa‐[n.2.1] skeletons were efficiently constructed.
Lewis Acids Promoted Formal Intramolecular [3 + 2] Parallel and Cross-Cycloadditions of Cyclopropane 1,1-Diesters with Allenes
作者:Zhenjun Wang、Jun Ren、Zhongwen Wang
DOI:10.1021/ol402662j
日期:2013.11.15
A novel Lewis acid promoted formal intramolecular [3 + 2] parallel/cross-cycloaddition of cyclopropane 1,1-diesters with allenes has been successfully developed, in which the two C=C of allenes were involved respectively. This provides a general and efficient strategy for the construction of structurally diverse [4.3.0]nonane and [3.2.1]octane skeletons.