Lewis Acid-Catalyzed Allylation Reactions of Acylhydrazones with Tetraallyltin in Aqueous Media
作者:Shū Kobayashi、Tomoaki Hamada、Kei Manabe
DOI:10.1055/s-2001-15166
日期:——
Allylation reactions of various benzoylhydrazones with tetraallyltin were found to proceed smoothly in the presence of scandium triflate as a Lewis acid catalyst at ambient temperature in aqueous media, to afford the corresponding homoallylic amine derivatives in high yields. Three-component reactions of aldehydes, benzoylhydrazine, and tetraallyltin were also catalyzed by scandium triflate in the same media. Furthermore, a simple procedure to prepare oxazolidinone derivatives utilizing these reactions was developed.
A Mild and Efficient Three-Component Synthesis of Secondary and Tertiary Homoallylic Hydrazides
作者:Bum Seok Lee、Doo Ok Jang
DOI:10.1002/ejoc.201201757
日期:2013.5
Zn(ClO4)2·6H2O was developed for the syntheses of secondary and tertiary homoallylic hydrazides. Excellent chemoselectivities and diastereoselectivies were observed. Aldehydes as well as acyclic and cyclic ketones were well-suited to the reaction conditions and provided secondary and tertiary homoallylic hydrazides in excellent yields.
Development of General Catalytic Allylation of Acylhydrazones with Pinacolyl Allylboronate Using an Indium(I) Catalyst
作者:Uwe Schneider、I-Hon Chen、Shū Kobayashi
DOI:10.1021/ol702756k
日期:2008.3.1
Catalytic allylation of various acylhydrazones using a group 13 metal reagent (boron) in combination with a group 13 metal catalyst in its low-oxidation state (indium) has been developed. This operationally simple carbon-carbon bond-forming reaction displays remarkable substrate scope and functional group tolerance.
Allyltrichlorosilanes reacted with benzoylhydrazones in DMF without the use of any catalyst to afford the corresponding homoallylic benzoylhydrazines in good to high yields. The reactions proceeded at 0 degrees C to room temperature under mild conditions. In addition, it was found that the reactions tolerated well the steric hindrance of hydrazones and allyltrichlorosilanes. Indeed, ketone-derived
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>‐Catalyzed N‐Allylation of Hydrazines with Allylic Alcohols
作者:Boxia Xu、Ji Yang、Zhen Yao、Zhuo Yang、Kai Liu、Xing Jin、Lijin Xu、Qian Shi
DOI:10.1002/adsc.202301347
日期:2024.3.8
A N-allylation of monosubstituted acyl hydrazines with allylicalcohols has been developed by using B(C6F5)3 catalysis. This protocol allows for convenient access to various synthetically useful N-allylated hydrazine products in 48-96% yields with broad substrate scope and wide functional group compatibility. The operationally simple reaction proceeds without calling for stringent removal of air and