Thietane and its 2-substituted derivatives were synthesized. A general preparation procedure for the synthesis of thietanes bearing alkyl and aryl substituents in the (x-position was developed. Using this procedure, 2-substituted thietanes can be obtained from cheap and easily accessible raw materials in three steps. 2-R-Thietanes (where R = H, CH3, C4H9,C5H11,C6H13,C6H5) and the corresponding sulfoxides and sulfones were synthesized and examined. Intermediate and by-products of the synthesis were studied.
Novel compounds of the structural formula (I) are activators of AMP-protein kinase and may be useful in the treatment, prevention and suppression of diseases mediated by the AMPK activated protein kinase. The compounds of the present invention may be useful in the treatment of Type 2 diabetes, hyperglycemia, metabolic syndrome, obesity, hypercholesterolemia, and hypertension.
Photochemical ring expansion reactions: synthesis of tetrahydrofuran derivatives and mechanism studies
作者:Sripati Jana、Zhen Yang、Chao Pei、Xinfang Xu、Rene M. Koenigs
DOI:10.1039/c9sc04069b
日期:——
of oxygen and sulfur ylide mediated rearrangements is even today a matter of debate. In this report, we describe ringexpansion reactions of oxetane and thietane heterocycles that allow probing the underlying reaction mechanism under metal-free, photochemical conditions. This ringexpansion proves highly efficient and allows the synthesis of tetrahydrofuran and thiolane heterocycles under mild and operationally
Reaction of primary or secondary 1,3-diols with dibenzoxazol-2-yl disulfide and tributylphosphine or triphenylphosphine selectively gave 2-(3-hydroxyalkylthio)benzoxazoles which, on treatment with KH, were converted into the corresponding thietanes. 2,2-Dibenzylthietane-1-oxide reacted with silylated purines and pyrimidines in the presence of TMSOTf and ZnI2 to give the corresponding thietane nucleosides in 17-69% yields.
Reductive opening of phenyl substituted thiacycloalkanes: New way for sulphur-containing organolithium compounds
作者:Juan Almena、Francisco Foubelo、Miguel Yus
DOI:10.1016/s0040-4020(97)00211-1
日期:1997.4
The reaction of 2-phenyl substituted four, five and six membered thiacycloalkanes (1, 4 and 7) with lithium and a catalytic amount of DTBB (5 mol %) in THF at −78°C leads to the corresponding sulphur-containing benzylic organolithium compounds (2, 5 and 8), which by reaction with different electrophiles [D2O, Me3SiCl, ButCHO, Me2CO, Et2CO, (CH2)4CO, CO2] followed by hydrolysis with water afford the
The Rh(II) catalyzed reaction of diethyl diazomalonate with thietanes: a facile synthesis of tetrahydrothiophene derivatives via sulfonium ylides
作者:Vijay Nair、Smitha M. Nair、Sindhu Mathai、Jürgen Liebscher、Burkhard Ziemer、K. Narsimulu
DOI:10.1016/j.tetlet.2004.05.062
日期:2004.7
A facile Rh(II) catalyzed reaction of diethyldiazomalonate with thietanes leading to highly substituted tetrahydrothiophenes along with allyl thioethers is described.