INOUE, TSUTOMU;INOUE, SEIICHI;SATO, KIKUMASA, BULL. CHEM. SOC. JAP., 63,(1990) N, C. 1062-1068
作者:INOUE, TSUTOMU、INOUE, SEIICHI、SATO, KIKUMASA
DOI:——
日期:——
CATO, KIKUMASA;INOUEH, SEHIITI;INOUEH, TSUTOMU
作者:CATO, KIKUMASA、INOUEH, SEHIITI、INOUEH, TSUTOMU
DOI:——
日期:——
US9879043B1
申请人:——
公开号:US9879043B1
公开(公告)日:2018-01-30
A New Synthesis of<i>o</i>-Quinonemethides and Their Inter- and Intramolecular Cyclization Reactions
作者:Tsutomu Inoue、Seiichi Inoue、Kikumasa Sato
DOI:10.1246/bcsj.63.1062
日期:1990.4
The reaction of o-[1-(alkylthio)alkyl]phenols with silver(I) oxide at room temperature generated o-quinonemethides in good yields along with silver alkanethiolate. This mechanism, based upon one-electron oxidation, is excluded in view of several experimental facts. The resulting o-quinonemethides reacted efficiently with ethyl vinyl ether to afford cis-chromans as the result of endo cycloaddition between (E)-o-quinonemethides and the ether. Similarly, o-[1-(alkylthio)allyl]phenols were converted to cis-chromans via the corresponding (E)-o-quinonemethides (6-allylidenecyclohexadienone). In the absence of dienophiles, some chromenes were obtained from the allylphenols.
Highly Regioselective Thiocarbonylation of Conjugated Dienes via Palladium-Catalyzed Three-Component Coupling Reactions
作者:Wen-Jing Xiao、Giuseppe Vasapollo、Howard Alper
DOI:10.1021/jo000231o
日期:2000.6.1
Three-component coupling reaction of conjugated dienes, thiols, and carbon monoxide affords an atom-economical thiocarbonylation of the dienes to give beta,gamma-unsaturated thioesters as the sole products. A catalyst system based on [Pd(OAc)(2)] and Ph(3)P showed excellent catalytic activity. The thiocarbonylation was performed under an atmosphere of carbon monoxide (400 psi) at 110 degrees C in CH(2)Cl(2)