Ferric(III) Chloride-Promoted Efficient Thiocyanation of Arylalkenes: A Facile Synthesis of Dithiocyanates
作者:J. Yadav、B. Reddy、Manoj Gupta
DOI:10.1055/s-2004-829150
日期:——
thiocyanate to the corresponding radical and promotes subsequent addition to nucleophilic olefins to produce dithiocyanate derivatives under mild conditions with high efficiency. Excellent yields and chemoselectivities together with the environmental-friendly nature of the Fe(III) chloride makes this method an attractive alternative to established methods. The use of ferric chloride makes it quite simple
Peroxodisulfate-assisted three-component benzylation of coumarins with styrenes and KSCN: a transition-metal-free approach for the synthesis of 3-(1-aryl-2-thiocyanatoethyl)-2<i>H</i>-chromen-2-one in ethyl lactate
作者:Palani Natarajan、Priya、Deachen Chuskit
DOI:10.1039/d1gc01382c
日期:——
Peroxodisulfate-assisted three-component benzylation of coumarins with styrenes and KSCN to 3-(1-aryl-2-thiocyanatoethyl)-2H-chromen-2-one is reported for the first time. This reaction proceeds via the consecutive addition of the SCN radical to styrenes followed by the addition of the resultant substituted-benzylic radical to the C3-position of coumarin derivatives. In contrast to previous approaches
首次报道了过二硫酸盐辅助香豆素与苯乙烯和 KSCN 的三组分苄基化反应生成 3-(1-aryl-2-thiocyanatoethyl)-2 H -chromen-2-one。该反应通过将 SCN 基团连续加成到苯乙烯上,然后将得到的取代苄基基团加成到香豆素衍生物的 C 3位进行。与以前通常需要过渡金属催化、有毒的挥发性有机溶剂、碱和高温的方法相比,香豆素的苄基化策略是无过渡金属和无碱的,并且在环境条件下适用于乳酸乙酯作为一种绿色介质。
Cerium(IV) Ammonium Nitrate Mediated Addition of Thiocyanate and Azide to Styrenes: Expeditious Routes to Phenacyl Thiocyanates and Phenacyl Azides
作者:Vijay Nair、Latha G Nair、Tesmol G George、Anu Augustine
DOI:10.1016/s0040-4020(00)00675-x
日期:2000.9
An efficient synthesis of phenacyl thiocyanates and phenacyl azides is described here. Styrenes react with ammonium thiocyanate and sodium azide in the presence of cerium(IV) ammoniumnitrate under an oxygen atmosphere to afford phenacyl thiocyanates and phenacyl azides respectively in good yields.