Copper(I)-Catalyzed Intramolecular Trifluoromethylation of Methylenecyclopropanes
作者:Zi-Zhong Zhu、Kai Chen、Liu-Zhu Yu、Xiang-Ying Tang、Min Shi
DOI:10.1021/acs.orglett.5b02940
日期:2015.12.18
Copper(I)-catalyzed intramolecular trifluoromethylation of methylenecyclopropanes has been developed to produce a variety of CF3-substituted dihydronaphthalenes in moderate to good yields, relying on the construction of C(sp2)–CF3 bonds under mild conditions. The reactions proceed through a radical process under copper(I) catalysis with a good compatibility for the functional group.
A Rhodium-Catalyzed C−H Activation/Cycloisomerization Tandem
作者:Christophe Aïssa、Alois Fürstner
DOI:10.1021/ja0746316
日期:2007.12.1
A reaction cascade comprising a rhodium-catalyzed C-H activation, a subsequent hydrometalation of an alkylidene cyclopropane in vicinity, regioselective C-C bond activation of the flanking cyclopropane ring, followed by reductive elimination of the resulting metallacycle, opens a new entry into functionalized cycloheptene derivatives. This crossover of C-H activation and higher order cycloaddition
反应级联反应包括铑催化的 CH 活化,随后附近亚烷基环丙烷的加氢金属化,侧翼环丙烷环的区域选择性 CC 键活化,然后还原消除所得金属环,打开了功能化环庚烯衍生物的新入口。CH 活化和更高级环加成的这种交叉已经以两种不同的形式进行,要么使用带有侧乙烯基吡啶部分的亚烷基环丙烷,要么使用悬垂的醛基作为触发器。该反应耐受各种官能团,使反应位点的手性中心 α 不受影响,并以优异的立体选择性进行。标记实验支持所提出的解释观察到的净环异构化过程的机制。
1‐Bromo‐2‐(cyclopropylidenemethyl)benzene: A Useful Building Block in the Palladium‐Catalyzed Reaction of 2‐Alkynylbenzenamine
A novel palladium‐catalyzed domino reaction of 1‐bromo‐2‐(cyclopropylidenemethyl)benzene and 2‐alkynylbenzenamine is reported, which generates 2‐(naphthalen‐2‐yl)benzenamines and 5H‐indeno[1,2‐c]quinolines via 6‐endo and 5‐exo cyclization, respectively. The regioselectivity for the final outcome can be affected by phosphine and N‐heterocyclic carbene ligands.
报道了一种新型的钯催化的1-溴-2-(环亚丙基甲基)苯与2-炔基苯甲胺的多米诺反应,该反应可生成2-(萘-2-基)苯甲胺和5 H-茚并[1,2- c ]喹啉分别通过6- end和5- exo环化。膦和N-杂环卡宾配体会影响最终结果的区域选择性。
An unexpected copper(<scp>ii</scp>)-catalyzed three-component reaction of quinazoline 3-oxide, alkylidenecyclopropane, and water
作者:Yuanyuan An、Danqing Zheng、Jie Wu
DOI:10.1039/c4cc04341c
日期:——
An unexpected copper(II)-catalyzed three-component reaction of quinazoline-3-oxide, alkylidenecyclopropane and water under mild conditions is reported. This transformation including [3+2] cycloaddition and intramolecular rearrangement leads to N-(2-(5-oxa-6-azaspiro[2.4]hept-6-en-7-yl)phenyl)formamides in good yields.
1‐Bromo‐2‐(cyclopropylidenemethyl)benzenes react with 2‐alkynylphenols under palladium catalysis, leading to indeno[1,2‐c]chromenes in moderate to good yields. The molecular complexity and diversity can be introduced efficiently from easily available starting materials.
1-溴-2-(环亚丙基甲基)苯在钯催化下与2-炔基苯酚反应,生成中等产率至中等产率的茚并[1,2- c ]二甲基苯。分子的复杂性和多样性可以从容易获得的原料中有效地引入。