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。
Activation of Vinyl Iodides for the Highly Enantioselective Addition to Aldehydes
作者:Albert M. DeBerardinis、Mark Turlington、Lin Pu
DOI:10.1002/anie.201007351
日期:2011.3.1
tolerant: Vinylzinc reagents were directly prepared from the reaction of vinyliodides with ZnEt2 under mild reaction conditions. The compound (S)‐1 was found to catalyze the addition of the vinylzinc reagents to a variety of aldehydes to generate structurally diverse allylic alcohols with high yields and enantioselectivities. This catalytic process can tolerate functional groups such as esters, chlorine
reaction tolerates a variety of functionalized internal and terminal alkynes to afford trans‐β‐alkoxyvinylbenziodoxoles, which represent versatile precursors to stereochemically well‐defined multisubstituted vinyl ethers. The reaction is proposed to involve cleavage of the I−F bond of FBX by BF3, followed by electrophilic activation of the alkyne by the resulting cationic IIII species that triggers the
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