TBAI/K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>Initiated Radical Cyclization to Synthesize<i>β</i>- Arylsulfonyl Naphthalenes from Homopropargylic Alcohols and Sulfonyl Hydrazides
作者:Xiaodong Yang、Lianbiao Zhao、Bingxiang Yuan、Zhenjie Qi、Rulong Yan
DOI:10.1002/adsc.201700634
日期:2017.9.18
metal‐free radical addition method for the synthesis of β‐arylsulfonyl naphthalenes with homopropargylic alcohols and sulfonyl hydrazides has been developed. In this reaction, sulfonyl hydrazide is employed as the source of sulfonyl radical to produce the desired sulfone directly. There is the first example for homopropargylic alcohol through direct intramolecular addition of vinyl radical to arenes
开发了一种金属自由基加成法,用高炔丙醇和磺酰肼合成β-芳基磺酰基萘。在该反应中,使用磺酰肼作为磺酰基的来源,以直接生产所需的砜。第一个例子是通过由TBAI / K 2 S 2 O 8反应系统引发的乙烯基与磺酰基基团直接向芳烃中分子内加成乙烯基炔醇,并以中等收率产生所需的产物。
A method for accessing sulfanylfurans from homopropargylic alcohols and sulfonyl hydrazides
作者:Xiaodong Yang、Rulong Yan
DOI:10.1039/c7ob00566k
日期:——
A sulfenylation/cyclization reaction has been developed for the synthesis of sulfanylfurans in the presence of iodine.
A highly efficient, chemo-, and regioselective approach has been developed for the switchable synthesis of tetrasubstituted alkenyl sulfones and naphthyl sulfones from homopropargylic alcohols via sulfonylation/1,4-aryl migration and sulfonylation/cyclization. The present switchable processes are characterized by mild and metal-free conditions, high selectivities, good functionalgroup tolerance, the
A mild procedure of palladium and copper catalyzed decarboxylative cross-coupling reaction of aryl halides and alkynyl carboxylic acids has been developed. Low molecular weight acids, to introduce small building blocks, were specifically used. This methodology is easy to implement and uses common reactants and catalysts.
Lewis Acid Promoted Oxonium Ion Driven Carboamination of Alkynes for the Synthesis of 4-Alkoxy Quinolines
作者:Santosh J. Gharpure、Santosh K. Nanda、Priyanka A. Adate、Yogesh G. Shelke
DOI:10.1021/acs.joc.6b02896
日期:2017.2.17
Lewis acid mediated multisegment coupling cascade is designed for the synthesis of densely substituted 4-alkoxy quinolines via an oxonium ion triggered alkyne carboamination sequence involving C–C and C–N bond formations. Cyclic ether fused-quinolines could also be accessed using this fast, operationally simple, high yielding, chemoselective and functional group tolerant method. Versatility and utility