Chemistry of novel compounds with multifunctional carbon structure. VI. Synthetic studies and 19F-nuclear magnetic resonance investigation of novel .ALPHA.,.ALPHA.-disubstituted fluoroacetates.
Bifunctionalized Allenes, Part IX: An Efficient Method for Regioselective Synthesis of 4-Heteroatom-Functionalized Allenecarboxylates
作者:Ivaylo K. Ivanov、Ivaylo D. Parushev、Valerij Ch. Christov
DOI:10.1002/hc.21096
日期:2013.7
An efficient method for regioselective synthesis of 4-heteroatom-functionalized allenecarboxylates by an atom economical [2,3]-sigmatropic rearrangement of the mediated 2-heteroatom-functionalized alk-3-ynecarboxylates is described. Alkyl 4-(dimethoxyphosphoryl), (diphenylphosphinoyl), (benzenesulfinyl), or (methanesulfonyl)-alka-2,3-dienoates can be readily prepared via reactions of alkyl 2-hydroxy-alk-3-ynoates
Stereospecific Synthesis of Alkyl Aryl Sulfides from Alcohols and 2-Sulfanylbenzothiazole Using Aryl Diphenylphosphinite and Azide Compounds by a New Type of Oxidation–Reduction Condensation
The preparation of alkylaryl sulfides from alcohols and 2-sulfanylbenzothiazole using phenyl diphenylphosphinite and azide compounds by a new type of oxidation–reduction condensation is described....
Synthesis of 2(3<i>H</i>)-Furanones via Electrophilic Cyclization
作者:Ziwei W. Just、Richard C. Larock
DOI:10.1021/jo702666j
日期:2008.4.1
variety of highly substituted 2(3H)-furanones are readily prepared from 3-alkynoate esters and the corresponding acids via electrophilic cyclization. Successful electrophiles in this process include I2, ICl, and PhSeCl. This highly efficient process proceeds under mild conditions, tolerates various functional groups, and generally provides substituted 2(3H)-furanones in good to excellent yields.