Preparation of Propargylic Sulfinates and their [2,3]-Sigmatropic Rearrangement to Allenic Sulfones
作者:Rama Rao Tata、Carissa S. Hampton、Michael Harmata
DOI:10.1002/adsc.201600986
日期:2017.4.3
scope of the [2,3]‐sigmatropic rearrangement of propargylic sulfinates to allenic sulfones by silver catalysis was expanded. A series of new propargylic sulfinate esters was generated from a variety of aromatic and heteroaromatic sulfonyl chlorides and their rearrangement to allenic sulfones is reported. In addition, the synthesis of propargylic sulfinate esters containing electron‐withdrawing benzenesulfonyl
[2,3] Sigmatropic Rearrangement of Propargylic Sulfinates by a Pale Ag<sup>1</sup>-USY Zeolite and Silver Salts
作者:Carissa S. Hampton、Michael Harmata
DOI:10.1002/adsc.201400978
日期:2015.2.9
AbstractThe sigmatropic rearrangement of propargylic sulfinates to allenic sulfones is catalyzed by the silver cation. The Ag1‐USY zeolite, as well as non‐coordinating silver salts, lead to essentially quantitative yields of the corresponding allenic sulfones.magnified image
Sulfinate Allenyl Carbenoids: Synthesis of 2,5‐Dihydrofurans by Domino Rearrangement and Cyclization
作者:Rama Rao Tata、Michael Harmata
DOI:10.1002/ejoc.201701743
日期:2018.1.23
Propargylic sulfinate esters can be deprotonated at the terminal acetylenic carbon and the resulting stable organolithium species can be trapped with aldehydes and ketones. Treatment of the products with silver fluoride results in both a 2,3‐sigmatropic shift and a heterocyclization to produce substituted 2,5‐dihydrofurans in excellent yield.