A Highly Efficient and Recyclable Pd(Pph<sub>3</sub>)<sub>4</sub>/Peg-400 System for Stille Cross-Coupling Reactions of Organostannanes with Aryl Bromides
作者:Xue Huang、Fang Yao、Ting Wei、Mingzhong Cai
DOI:10.3184/174751917x15045169836226
日期:2017.9
Pd(PPh3)4 in PEG-400 is shown to be a highly efficient catalyst for the Stille cross-coupling reactions of various organotin compounds with arylbromides. The reaction could be conducted at 80 °C using NaOAc as base, yielding a variety of biaryls, alkynes and alkenes in good to excellent yields. The isolation of the products was readily performed by extraction with petroleum ether and the Pd(PPh3)4/PEG-400
MCM-41-supported bidentate phosphine palladium(0) complex as an efficient catalyst for the heterogeneous Stille reaction
作者:Hong Zhao、Yue Wang、Junchao Sha、Shouri Sheng、Mingzhong Cai
DOI:10.1016/j.tet.2008.05.120
日期:2008.8
Stille coupling reaction of organostannanes with organic halides has been developed in the presence of a catalytic amount of MCM-41-supportedbidentatephosphine palladium(0) complex (0.5 mol %) in DMF/H2O (9:1) under air atmosphere in high yields. This polymeric palladium catalyst exhibits higher activity than Pd(PPh3)4 and can be reused at least 10 times without any decrease in activity.
在空气中DMF / H 2 O(9:1)中催化量的MCM-41负载的双齿膦膦钯(0)络合物(0.5 mol%)的存在下,开发了有机锡与有机卤化物的Stille偶联反应。高产的气氛。该聚合钯催化剂显示出比Pd(PPh 3)4更高的活性,并且可以重复使用至少10次而活性没有降低。
Regio- and Stereoselective Synthesis of Enol Carboxylate, Phosphate, and Sulfonate Esters via Iodo(III)functionalization of Alkynes
synthesized through regio- and stereoselective iodo(III)functionalization of alkynes. The combination of chlorobenziodoxole and silver salt has proven to generate a versatile cationic iodine(III) electrophile to activate alkynes and engage various carboxylic acids, triethyl phosphate, and p-toluenesulfonic acid as nucleophiles. The β-iodo(III)enol esters serve as starting materials for the synthesis of multisubstituted
Palladium-catalyzed allylation of sulfonyl hydrazides with alkynes to synthesize allylic arylsulfones
作者:Chuan-Jun Lu、Hong Chen、Dong-Kai Chen、Hong Wang、Zhen-Ping Yang、Jianrong Gao、Hongwei Jin
DOI:10.1039/c6ob01929c
日期:——
A novel method for the construction of allyl sulfone derivatives was developed by palladium catalyzed allylation of sulfony hydrazides with alkynes.
通过钯催化磺酰肼与炔烃的烯丙基化反应,开发出了一种构建烯丙基砜衍生物的新方法。
Synthesis of Isoindolo[2,1-<i>a</i>]indoles by the Palladium-Catalyzed Annulation of Internal Acetylenes
作者:Kevin R. Roesch、Richard C. Larock
DOI:10.1021/jo000997o
日期:2001.1.1
substituted isoindolo[2,1-alpha]indoles have been prepared via annulation of internal alkynes by imines derived from o-iodoanilines in the presence of a palladium catalyst. This methodology provides an extremely efficient route for the synthesis of these tetracyclic heterocycles from readily available starting materials. The mechanism of this interesting annulation process appears to involve (1) oxidative