亚硝酸叔丁酯(TBN)与各种内部烯烃的反应不同,从而产生有趣且有用的产物。使用亚硝酸叔丁酯(TBN),喹啉和K 2 S 2 O 8可从内部烯烃中合成1,2,5-恶二唑N-氧化物(呋喃烷)。在相同的反应条件下,α,β-不饱和羧酸以及环状和无环内部烯烃都分别通过脱羧和直接硝化途径提供了硝基烯烃作为唯一产物。
Iodine-Promoted Metal-Free Head-to-Tail Dimerization of Styrenes Affording 1,3-Diarylbut-1-enes
作者:Sen Lin、Shengmei Guo、Dingyi Wang、Yanjiao Fang、Qihuang Xie、Zhaohua Yan
DOI:10.1055/s-0036-1589214
日期:——
A convenient and efficient iodine-mediated head-to-tail dimerization of styrenes to produce the corresponding dimers in the presence of triethyl phosphite is reported. The advantages of the present protocol are metal-free conditions, short reaction time, simplicity, and high efficiency.
Highly Efficient Catalytic Dimerization of Styrenes<i>via</i>Cationic Palladium(II) Complexes
作者:Ji Hye Choi、Jae Kwan Kwon、T. V. RajanBabu、Hwan Jung Lim
DOI:10.1002/adsc.201300864
日期:2013.12.16
AbstractA highly efficient head‐to‐tail dimerization of a styrene was developed using a cationic palladium(II)‐catalyzed selective CC bond forming reaction. The complex [AllylPd(PPh3)]+OTf−, which is believed to generate ‘palladium hydride’ (PdH), catalyzed the dimerization of various styrenes in excellent yields as single isomers. This Pd(II)‐catalyzed reaction provides a new economical CC bond forming method.magnified image