Transition-Metal-Free Cross-Coupling of Aryl Halides with Arylstannanes
作者:Qing He、Liwen Wang、Yong Liang、Zunting Zhang、Stanislaw F. Wnuk
DOI:10.1021/acs.joc.6b01648
日期:2016.10.7
Transition-metal-free LiCl-promoted cross-coupling reactions of tetraphenyltin, trichlorophenyl-, dichlorodiphenyl-, and chlorotriphenylstannanes with arylhalides in DMF provided access to biaryls in good to high yields. Up to four phenyl groups were transferred from the organostannanes substrates. The aryls bearing electron-withdrawing groups in either halides or organotin substrates gave coupling
Room-Temperature Palladium(II)-Catalyzed Direct 2-Arylation of Indoles with Tetraarylstannanes
作者:Yuxia Liu、Dong Xue、Chao Wang、Linjuan Huang
DOI:10.1055/s-0040-1707196
日期:2020.10
A palladium(II)-catalyzed direct 2-arylation of indoles by tetraarylstannanes with oxygen (balloon) as the oxidant at room temperature has been developed. Various tetraarylstannanes can be employed as aryl sources for 2-arylation of indoles in up to 89% yield, providing a practical and efficient catalytic protocol for accessing 2-arylindoles.
已开发出钯 (II) 催化的四芳基锡烷与氧(气球)作为氧化剂在室温下直接对吲哚进行 2-芳基化反应。各种四芳基锡烷可用作吲哚 2-芳基化的芳基来源,产率高达 89%,为获得 2-芳基吲哚提供了实用且有效的催化方案。
Palladium(II)- and Rhodium(III)-Catalyzed Carbonylation Reaction of Aryltin Compounds
variety of aryltin compounds can be employed for carbonylation reactions in the presence of a catalytic amount of palladium(II) salt with reoxidant in acetonitrile or acetic acid under an atmospheric pressure of carbon monoxide (CO) to afford arenecarboxylic acids and diaryl ketones. Similar reactions also proceed by using rhodium(III) salt as a catalyst, where the presence of reoxidant is sometimes
在催化量的钯 (II) 盐存在下,在乙腈或乙酸中,在一氧化碳 (CO) 的大气压下,多种芳基锡化合物可用于羰基化反应,得到芳烃羧酸和二芳基酮。使用铑 (III) 盐作为催化剂也可以进行类似的反应,其中有时不需要再氧化剂的存在。芳基锡化合物的两个、三个或四个芳基中的一个以上,在某些情况下几乎全部,可以转移到这种催化羰基化的产物中。
Palladium(II)-Catalyzed Michael-Type Hydroarylation of Nitroalkenes Using Aryltins and Sodium Tetraarylborates
作者:Toshiyuki Ohe、Sakae Uemura
DOI:10.1246/bcsj.76.1423
日期:2003.7
variety of aryltin compounds and sodium tetraarylborates can be employed for Michael-type hydroarylation reactions of nitroalkenes to afford β-arylnitroalkanes in moderate to good yields in the presence of either LiCl, MgCl2, or CaCl2 and a catalytic amount of palladium(II) salt (0.05 molar amount) in acetic acid. Results show that 50–70% of aryl groups out of all in these arylcompounds can be transferred
Palladium(II)-Catalyzed Michael-Type Addition Reactions Using Aryltin Compounds
作者:Toshiyuki Ohe、Takeshi Wakita、Shin-ichi Motofusa、Chan Sik Cho、Kouichi Ohe、Sakae Uemura
DOI:10.1246/bcsj.73.2149
日期:2000.9
A variety of aryltin compounds can be employed for Michael-type hydroarylation reactions to α,β-unsaturated ketones and aldehydes in the presence of a catalytic amount of palladium(II) salt in acetic acid under air. Each reaction is much accelerated in the presence of a soluble metal chloride such as LiCl, MgCl2, and CaCl2. It is found that slightly fewer than four aryl groups of tetraaryltins can
多种芳基锡化合物可用于在乙酸中在催化量的钯 (II) 盐存在下,在空气中进行迈克尔型加氢芳基化反应,生成 α,β-不饱和酮和醛。在可溶性金属氯化物如 LiCl、MgCl2 和 CaCl2 的存在下,每个反应都会大大加速。发现在该芳基化反应中,四芳基锡的芳基略少于四个可以转移到产物中。